Παραπομπή σε μορφή APA (7η εκδ.)

Cunningham, W. P. (2007). Environmental scienceA global concernWilliam Cunning, Mary Ann Cunningham, Barbara Woodworth Saigo. Higher Education.

Παραπομπή σε μορφή Chicago (17η εκδ.)

Cunningham, William P. Environmental ScienceA Global ConcernWilliam Cunning, Mary Ann Cunningham, Barbara Woodworth Saigo. Higher Education, 2007.

Παραπομπή σε μορφή MLA (8th εκδ.)

Cunningham, William P. Environmental ScienceA Global ConcernWilliam Cunning, Mary Ann Cunningham, Barbara Woodworth Saigo. Higher Education, 2007.