APA (7th ed.) Citation

European Congress on Sleep Research, Koella, W. P., & Levin, P. (1973). Sleep: Psysiology, biochemistry, psychology, pharmacology, clinical implications. Karger.

Chicago Style (17th ed.) Citation

European Congress on Sleep Research, Werner Paul Koella, and Philip Levin. Sleep: Psysiology, Biochemistry, Psychology, Pharmacology, Clinical Implications. Basel, N.Y: Karger, 1973.

MLA (8th ed.) Citation

European Congress on Sleep Research, et al. Sleep: Psysiology, Biochemistry, Psychology, Pharmacology, Clinical Implications. Karger, 1973.