APA (7th ed.) Citation

D, L. (2002). Stewardship of the seas. Biologist (London, England), 49(6), 243.

Chicago Style (17th ed.) Citation

D, Laffoley. "Stewardship of the Seas." Biologist (London, England) 49, no. 6 (2002): 243.

MLA (9th ed.) Citation

D, Laffoley. "Stewardship of the Seas." Biologist (London, England), vol. 49, no. 6, 2002, p. 243.