Παραπομπή σε μορφή APA (7η εκδ.)

Sperb, R. P. (1981). Maximum principles and their applications. Academic Press.

Παραπομπή σε μορφή Chicago (17η εκδ.)

Sperb, Rene P. Maximum Principles and Their Applications. New York: Academic Press, 1981.

Παραπομπή σε μορφή MLA (8th εκδ.)

Sperb, Rene P. Maximum Principles and Their Applications. Academic Press, 1981.