Cita APA (7a ed.)
Harrison, W. E., & Testa, S. M. (2003). Petroleum and the environment. American Geological Institute.
Cita Chicago Style (17a ed.)
Harrison, William E., y Stephen M. Testa. Petroleum and the Environment. Alexandria, VA: American Geological Institute, 2003.
Cita MLA (9a ed.)
Harrison, William E., y Stephen M. Testa. Petroleum and the Environment. American Geological Institute, 2003.
Precaución: Estas citas no son 100% exactas.