Citazione Stile APA (7a Edizione)

Crewe, R. J., Hildebrand, W., & Massey, D. (1989). Our world: Discovering patterns in physical geography. Heath.

Citazione stile Chigago Style (17a edizione)

Crewe, R. James, William Hildebrand, e Donald Massey. Our World: Discovering Patterns in Physical Geography. Toronto: Heath, 1989.

Citatione MLA (9a ed.)

Crewe, R. James, et al. Our World: Discovering Patterns in Physical Geography. Heath, 1989.