APA (7th ed.) Citation

Gadd, M., Durell, A., & Boothroyd, J. (1985). The book of windsurfing: A guide to boardsailing techniques. Nelson.

Chicago Style (17th ed.) Citation

Gadd, Mike, Ann Durell, and John Boothroyd. The Book of Windsurfing: A Guide to Boardsailing Techniques. Melbourne: Nelson, 1985.

MLA (9th ed.) Citation

Gadd, Mike, et al. The Book of Windsurfing: A Guide to Boardsailing Techniques. Nelson, 1985.