Παραπομπή σε μορφή APA (7η εκδ.)

Cunningham, W. P., & Cunningham, M. A. (2020). Principles of environmental science: Inquiry & applications (Ninth editon.). McGraw-Hill Education.

Παραπομπή σε μορφή Chicago (17η εκδ.)

Cunningham, William P., και Mary Ann Cunningham. Principles of Environmental Science: Inquiry & Applications. Ninth editon. New York, NY: McGraw-Hill Education, 2020.

Παραπομπή σε μορφή MLA (9th εκδ.)

Cunningham, William P., και Mary Ann Cunningham. Principles of Environmental Science: Inquiry & Applications. Ninth editon. McGraw-Hill Education, 2020.