APA (7th ed.) Citation

Harker, J. E. (1964). The physiology of diurnal rhythms, by Janet E. Harker. University Press.

Chicago Style (17th ed.) Citation

Harker, Janet E. The Physiology of Diurnal Rhythms, by Janet E. Harker. Cambridge [England]: University Press, 1964.

MLA (9th ed.) Citation

Harker, Janet E. The Physiology of Diurnal Rhythms, by Janet E. Harker. University Press, 1964.