Gaya APA

Cunningham, W, {, E, A, }. (2017). Principles of Environmental Science Inquiry and Application (Eight h Edition). New York: Mc Graw Hill Education.

Gaya MLA

Cunningham, William, {, Et, Al, }. "Principles of Environmental Science Inquiry and Application". Eight h Edition New York: Mc Graw Hill Education, 2017. Text.