APA (7e ed.) Bronvermelding

Alemayehu, A., & Brown, D. R. (1993). Gastrointestinal regulatory peptides. Springer-Verlag.

Chicago (17e ed.) Bronvermelding

Alemayehu, A., en David Robert Brown. Gastrointestinal Regulatory Peptides. Berlin: Springer-Verlag, 1993.

MLA (9e ed.) Bronvermelding

Alemayehu, A., en David Robert Brown. Gastrointestinal Regulatory Peptides. Springer-Verlag, 1993.