APA (7th ed.) Citation

ScienceDirect (Online service), Kojima, M., & Kangawa, K. (2012). Ghrelin. Elsevier/Academic Press.

Chicago Style (17th ed.) Citation

ScienceDirect (Online service), Masayasu Kojima, and Kenji Kangawa. Ghrelin. Amsterdam, Netherland ; Boston, Mass.: Elsevier/Academic Press, 2012.

MLA (9th ed.) Citation

ScienceDirect (Online service), et al. Ghrelin. Elsevier/Academic Press, 2012.