APA引文

Voices of America (Radio Program) & Cohen, S. B. (1967). Geography and the American environment. s.n.

Chicago Style (17th ed.) Citation

Voices of America (Radio Program) and Saul B. Cohen. Geography and the American Environment. Washington, D.C: s.n, 1967.

MLA引文

Voices of America (Radio Program) and Saul B. Cohen. Geography and the American Environment. s.n, 1967.