APA citiranje

Johannsen, L., Rosenthal, R. S., Martin, S. A., Cady, A. B., Obal, F., Guinand, M., & Krueger, J. M. (1989). Somnogenic activity of O-acetylated and dimeric muramyl peptides.

Citação norma Chicago

Johannsen, L., R S. Rosenthal, S A. Martin, A B. Cady, F. Obal, M. Guinand, and J M. Krueger. Somnogenic Activity of O-acetylated and Dimeric Muramyl Peptides. 1989.

MLA citiranje

Johannsen, L., et al. Somnogenic Activity of O-acetylated and Dimeric Muramyl Peptides. 1989.