APA (7th ed.) Citation

ScienceDirect (Online service), Hall, R. L., & Sharp, H. S. (1978). Wolf and man: Evolution in parallel. Academic Press.

Chicago Style (17th ed.) Citation

ScienceDirect (Online service), Roberta L. Hall, and Henry S. Sharp. Wolf and Man: Evolution in Parallel. New York: Academic Press, 1978.

MLA (9th ed.) Citation

ScienceDirect (Online service), et al. Wolf and Man: Evolution in Parallel. Academic Press, 1978.