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.
Precaución: Estas citas no son 100% exactas.