Παραπομπή σε μορφή APA (7η εκδ.)

Harte, J. (1988). Consider a spherical cow: A course in environmental problem solving. University Science Books.

Παραπομπή σε μορφή Chicago (17η εκδ.)

Harte, John. Consider a Spherical Cow: A Course in Environmental Problem Solving. Sausalito: University Science Books, 1988.

Παραπομπή σε μορφή MLA (8th εκδ.)

Harte, John. Consider a Spherical Cow: A Course in Environmental Problem Solving. University Science Books, 1988.