APA (7th ed.) Citation

Norstog, K. (1985). Biology (2a. ed.). Charles E. Merril.

Chicago Style (17th ed.) Citation

Norstog, Knut. Biology. 2a. ed. London: Charles E. Merril, 1985.

MLA (9th ed.) Citation

Norstog, Knut. Biology. 2a. ed. Charles E. Merril, 1985.

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