Cita APA (7a ed.)

CUNNINGHAM, W. P., CUNNINGHAM, M. A., & SAIGO, B. W. (2003). Environmental science: A global concern.-- ed.7. McGraw-Hill.

Cita Chicago Style (17a ed.)

CUNNINGHAM, William P., Mary Ann CUNNINGHAM, y Barbara Woodworth SAIGO. Environmental Science: A Global Concern.-- Ed.7. Boston: McGraw-Hill, 2003.

Cita MLA (9a ed.)

CUNNINGHAM, William P., et al. Environmental Science: A Global Concern.-- Ed.7. McGraw-Hill, 2003.