APA (7th ed.) Citation

Olney, P. J. S. (1988). 1987 International Zoo year book. Zoological Society of London.

Chicago Style (17th ed.) Citation

Olney, P. J. S. 1987 International Zoo Year Book. London: Zoological Society of London, 1988.

MLA (9th ed.) Citation

Olney, P. J. S. 1987 International Zoo Year Book. Zoological Society of London, 1988.

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