APA-referens (7:e uppl.)

Cohen, S. B. (1967). Geography and the American environment. s.n.

Chicago-referens (17:e uppl.)

Cohen, Saul B. Geography and the American Environment. Washington, D.C: s.n, 1967.

MLA-referens (9:e uppl.)

Cohen, Saul B. Geography and the American Environment. s.n, 1967.