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. USA: Blackwell, 2004.

MLA استشهاد

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