APA (7th ed.) Citation

Robertson, H. A., & Heather, B. D. (2001). The hand guide to the birds of New Zealand. Oxford University Press.

Chicago Style (17th ed.) Citation

Robertson, Hugh A., and B. D. Heather. The Hand Guide to the Birds of New Zealand. Oxford ; New York: Oxford University Press, 2001.

MLA (9th ed.) Citation

Robertson, Hugh A., and B. D. Heather. The Hand Guide to the Birds of New Zealand. Oxford University Press, 2001.