APA (7th ed.) Citation

Toole, A. G., & Toole, S. M. (1988). A-level course biology: Course companion (4th ed.). Charles Letts.

Chicago Style (17th ed.) Citation

Toole, A. G., and S. M. Toole. A-level Course Biology: Course Companion. 4th ed. London: Charles Letts, 1988.

MLA (9th ed.) Citation

Toole, A. G., and S. M. Toole. A-level Course Biology: Course Companion. 4th ed. Charles Letts, 1988.

Warning: These citations may not always be 100% accurate.