APA (7th ed.) Citation

Cook, S., & Cook, D. (1976). A closer look at ocean life. Hamilton.

Chicago Style (17th ed.) Citation

Cook, Susannah, and David Cook. A Closer Look at Ocean Life. London: Hamilton, 1976.

MLA (9th ed.) Citation

Cook, Susannah, and David Cook. A Closer Look at Ocean Life. Hamilton, 1976.