CSE 9th edition
CSE 8th vs 9th edition: what changed
The CSE Manual’s 9th edition (2024) simplified several reference rules. Here are the differences, with the same sources formatted both ways by our generator.
| Rule | 8th edition (2014) | 9th edition (2024) |
|---|---|---|
| Authors listed | Up to 10; then first 10 + “et al.” | Up to 5; with 6 or more, first author + “et al” |
| “et al” punctuation | et al. | et al (no period) |
| DOI | doi:10.1001/… | https://doi.org/10.1001/… |
| Place of publication | Required: Princeton (NJ): Publisher | Omitted: publisher name only |
| Access date for web sources | Always for online material | Only when no publication or update date exists |
| Page ranges | 1291-1297 | 1291–1297 (en dash) |
| “p” for chapter pages | p. 269-301 | p 269–301 |
| New examples | — | Preprints, social media, YouTube, motion pictures |
Side-by-side examples
Journal article with more than 5 authors
8th edition
Ashraf M, B B, C C, D D, E E, F F. Interaction between the distribution of diabetic retinopathy lesions and the association of optical coherence tomography angiography scans with diabetic retinopathy severity. JAMA Ophthalmol. 2020;138(12):1291-1297. doi:10.1001/jamaophthalmol.2020.4516
9th edition
Ashraf M et al. Interaction between the distribution of diabetic retinopathy lesions and the association of optical coherence tomography angiography scans with diabetic retinopathy severity. JAMA Ophthalmol. 2020;138(12):1291–1297. https://doi.org/10.1001/jamaophthalmol.2020.4516
Book
8th edition
Russel K, Sheppard C. 2021. Coral reefs: a natural history. Princeton (NJ): Princeton University Press.
9th edition
Russel K, Sheppard C. 2021. Coral reefs: a natural history. Princeton University Press.
Chapter in an edited book
8th edition
Geisslitz S, Scherf K. The holy grail of ancient cereals. In: Boukid F, editor. Cereal-based foodstuffs: the backbone of Mediterranean cuisine. Cham (Switzerland): Springer; 2021. p. 269-301.
9th edition
Geisslitz S, Scherf K. The holy grail of ancient cereals. In: Boukid F, editor. Cereal-based foodstuffs: the backbone of Mediterranean cuisine. Springer; 2021. p 269–301.
Web page with a publication date
8th edition
Basics of climate change. US Environmental Protection Agency; 2024 Apr 2 [accessed 2025 Feb 10]. https://www.epa.gov/climatechange-science/basics-climate-change
9th edition
Basics of climate change. US Environmental Protection Agency; 2024 Apr 2. https://www.epa.gov/climatechange-science/basics-climate-change
In-text citations change too: 8th (Ashraf et al. 2020) vs 9th (Ashraf et al 2020).
Update an old reference list
Import your RIS or BibTeX file into the generator and every reference is reformatted to the 9th edition.