Παραπομπή APA

Peter Calvert & Susan Calvert. (1999). The South, The North and the Environment.

Παραπομπή Chicago Style

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

Παραπομπή MLA

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