APA (7th ed.) Citation

Barnes, R. S. K., & Hughes, R. N. (1999). An introduction to marine ecology (3rd ed.). Blackwell Science.

Chicago Style (17th ed.) Citation

Barnes, R. S. K., and R. N. Hughes. An Introduction to Marine Ecology. 3rd ed. Oxford [England], Malden, MA, USA: Blackwell Science, 1999.

MLA (9th ed.) Citation

Barnes, R. S. K., and R. N. Hughes. An Introduction to Marine Ecology. 3rd ed. Blackwell Science, 1999.