APA (7th ed.) Citation

Harrison, P., & Peterson, R. T. (1983). Seabirds: An identification guide. Christopher Helm.

Chicago Style (17th ed.) Citation

Harrison, Peter, and Roger Tory Peterson. Seabirds: An Identification Guide. London: Christopher Helm, 1983.

MLA (8th ed.) Citation

Harrison, Peter, and Roger Tory Peterson. Seabirds: An Identification Guide. Christopher Helm, 1983.

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