APA-referens (7:e uppl.)

Gallopin, G. C. (1981). Planning methods and the human environment. Unesco.

Chicago-referens (17:e uppl.)

Gallopin, Gilberto C. Planning Methods and the Human Environment. Paris: Unesco, 1981.

MLA-referens (9:e uppl.)

Gallopin, Gilberto C. Planning Methods and the Human Environment. Unesco, 1981.