Citazione Stile APA (7a Edizione)

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

Citazione stile Chigago Style (17a edizione)

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

Citatione MLA (9a ed.)

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