Cita APA (7th ed.)

Allen, J. L. (1999). Annual editions: Environment. 1999. Dushkin/McGraw-Hill.

Cita Chicago (17th ed.)

Allen, John L. Annual Editions: Environment. 1999. Guilford, Connecticut: Dushkin/McGraw-Hill, 1999.

Cita MLA (9th ed.)

Allen, John L. Annual Editions: Environment. 1999. Dushkin/McGraw-Hill, 1999.