APA (7th ed.) Citation

ScienceDirect (Online service), Udenfriend, S., & Meienhofer, J. (1984). The peptides: Analysis, synthesis, biology. Academic Press.

Chicago Style (17th ed.) Citation

ScienceDirect (Online service), Sidney Udenfriend, and Johannes Meienhofer. The Peptides: Analysis, Synthesis, Biology. [Orlando]: Academic Press, 1984.

MLA (9th ed.) Citation

ScienceDirect (Online service), et al. The Peptides: Analysis, Synthesis, Biology. Academic Press, 1984.