APA (7th ed.) Citation

Nian, B., Wang, B., Wang, L., & Yi, L. A Cohort Study to Compare Effects between Ulcer- and Nonulcer-Related Nonvariceal Upper Gastrointestinal Bleeding. Wiley.

Chicago Style (17th ed.) Citation

Nian, Bi, Bangping Wang, Long Wang, and Lanjuan Yi. A Cohort Study to Compare Effects Between Ulcer- and Nonulcer-Related Nonvariceal Upper Gastrointestinal Bleeding. Wiley.

MLA (9th ed.) Citation

Nian, Bi, et al. A Cohort Study to Compare Effects Between Ulcer- and Nonulcer-Related Nonvariceal Upper Gastrointestinal Bleeding. Wiley.