APA استشهاد

Gaston, K. J., & Spicer, J. I. (2004). Biodiversity: An Introduction (2nd ed.). Blackwell.

استشهاد بنمط شيكاغو

Gaston, Kevin J., و John I. Spicer. Biodiversity: An Introduction. 2nd ed. Oxford: Blackwell, 2004.

MLA استشهاد

Gaston, Kevin J., و John I. Spicer. Biodiversity: An Introduction. 2nd ed. Blackwell, 2004.