APA (7th ed.) Citation

Oldroyd, H. (1968). Elements of entomology. Weidenfeld and Nicolson.

Chicago Style (17th ed.) Citation

Oldroyd, Harold. Elements of Entomology. London: Weidenfeld and Nicolson, 1968.

MLA (9th ed.) Citation

Oldroyd, Harold. Elements of Entomology. Weidenfeld and Nicolson, 1968.

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