Citazione Stile APA (7a Edizione)

London, N. A., & Senior, M. (1991). Principles of geography for CXC ([2nd ed.].). Longman.

Citazione stile Chigago Style (17a edizione)

London, Norrel A., e Michael Senior. Principles of Geography for CXC. [2nd ed.]. London: Longman, 1991.

Citatione MLA (9a ed.)

London, Norrel A., e Michael Senior. Principles of Geography for CXC. [2nd ed.]. Longman, 1991.