APA-referens (7:e uppl.)

Griggs, G. B. (1977). The earth and land use planning. Duxbury Press.

Chicago-referens (17:e uppl.)

Griggs, Gary B. The Earth and Land Use Planning. Massachusetts: Duxbury Press, 1977.

MLA-referens (9:e uppl.)

Griggs, Gary B. The Earth and Land Use Planning. Duxbury Press, 1977.