APA (7th ed.) Citation

Essig, E. O., & Abernathy, F. (1952). The aphid genus Periphyllus: A systematic, biological & ecological study. University of California Press.

Chicago Style (17th ed.) Citation

Essig, E. O., and Frieda Abernathy. The Aphid Genus Periphyllus: A Systematic, Biological & Ecological Study. Berkeley: University of California Press, 1952.

MLA (9th ed.) Citation

Essig, E. O., and Frieda Abernathy. The Aphid Genus Periphyllus: A Systematic, Biological & Ecological Study. University of California Press, 1952.