APA استشهاد

Calvert, P., & Calvert,Susan. (1999). The South, the North, and the environment. Pinter.

استشهاد بنمط شيكاغو

Calvert, Peter, و Calvert,Susan. The South, the North, and the Environment. London: Pinter, 1999.

MLA استشهاد

Calvert, Peter, و Calvert,Susan. The South, the North, and the Environment. Pinter, 1999.