Cita APA (7th ed.)

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

Cita Chicago (17th ed.)

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

Cita MLA (9th ed.)

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