Cita APA (7th ed.)

Freedman, B. (2001). Environmental science: A Canadian perspective. Prentice Hall.

Cita Chicago (17th ed.)

Freedman, Bill. Environmental Science: A Canadian Perspective. Toronto: Prentice Hall, 2001.

Cita MLA (8th ed.)

Freedman, Bill. Environmental Science: A Canadian Perspective. Prentice Hall, 2001.