Cita APA (7a ed.)

Bernards, N. (1991). The Environmental crisis--opposing viewpoints. Greenhaven Press.

Cita Chicago Style (17a ed.)

Bernards, Neal. The Environmental Crisis--opposing Viewpoints. San Diego, CA: Greenhaven Press, 1991.

Cita MLA (8a ed.)

Bernards, Neal. The Environmental Crisis--opposing Viewpoints. Greenhaven Press, 1991.