Cita APA (7a ed.)

Knox, P. L. (1988). The United States: : a contemporary human geography. Longman Scientific & Technical.

Cita Chicago Style (17a ed.)

Knox, Paul L. The United States: : A Contemporary Human Geography. Harlow: Longman Scientific & Technical, 1988.

Cita MLA (9a ed.)

Knox, Paul L. The United States: : A Contemporary Human Geography. Longman Scientific & Technical, 1988.