Alemayehu, A., & Brown, D. R. (1993). Gastrointestinal regulatory peptides. Springer-Verlag.
Lua i Stíl Chicago (17ú heag.)Alemayehu, A., agus David Robert Brown. Gastrointestinal Regulatory Peptides. Berlin: Springer-Verlag, 1993.
Lua MLA (9ú heag.)Alemayehu, A., agus David Robert Brown. Gastrointestinal Regulatory Peptides. Springer-Verlag, 1993.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.