Παραπομπή σε μορφή APA (7η εκδ.)

Young, L. C. (1980). Lecture on the calculus of variations and optimal control theory (2nd edition.). AMS Chelsea Publishing.

Παραπομπή σε μορφή Chicago (17η εκδ.)

Young, L. C. Lecture on the Calculus of Variations and Optimal Control Theory. 2nd edition. New York: AMS Chelsea Publishing, 1980.

Παραπομπή σε μορφή MLA (8th εκδ.)

Young, L. C. Lecture on the Calculus of Variations and Optimal Control Theory. 2nd edition. AMS Chelsea Publishing, 1980.