Gaya APA

SPOOLMAN, G, T, M, J, A, S, E. (2007). Essentials of Ecology (Ed. 5). USA: Thomson Brooks/Cole.

Gaya MLA

SPOOLMAN, G., TYLER, MILLER,, JR., And, SCOTT, E.. "Essentials of Ecology". Ed. 5 USA: Thomson Brooks/Cole, 2007. Text.