Gaya APA

Derr, T, S. (1973). Ecology and human liberation, a theological critique of the use and abuse of our birthright. . [Geneva: WSCF].

Gaya MLA

Derr, Thomas, Sieger.. "Ecology and human liberation, a theological critique of the use and abuse of our birthright. ". [Geneva: WSCF], 1973. Buku.