Παραπομπή σε μορφή APA (7η εκδ.)

Girardi, M., Matzeu, M., & Pacella, F. (1992). Progress in variational methods in Hamiltonian systems and elliptic equations. Longman Scientific & Technical : Wiley.

Παραπομπή σε μορφή Chicago (17η εκδ.)

Girardi, Mario, M. Matzeu, και F. Pacella. Progress in Variational Methods in Hamiltonian Systems and Elliptic Equations. Harlow, Essex England ; New York: Longman Scientific & Technical : Wiley, 1992.

Παραπομπή σε μορφή MLA (9th εκδ.)

Girardi, Mario, et al. Progress in Variational Methods in Hamiltonian Systems and Elliptic Equations. Longman Scientific & Technical : Wiley, 1992.