APA (7th ed.) Citation

Kilgour, O. F. G. (1987). Mastering biology. Macmillan.

Chicago Style (17th ed.) Citation

Kilgour, O F G. Mastering Biology. London: Macmillan, 1987.

MLA (9th ed.) Citation

Kilgour, O F G. Mastering Biology. Macmillan, 1987.