Cita APA (7th ed.)

Allen, J. L. (2004). Environment 04/05 (Twenty-third edition.). Mcgraw-Hill/Dushkin.

Cita Chicago (17th ed.)

Allen, J. L. Environment 04/05. Twenty-third edition. Dubuque, Iowa: Mcgraw-Hill/Dushkin, 2004.

Cita MLA (9th ed.)

Allen, J. L. Environment 04/05. Twenty-third edition. Mcgraw-Hill/Dushkin, 2004.