Παραπομπή σε μορφή APA (7η εκδ.)

Bahri, A. (1989). Critical points at infinity in some variational problems. Longman Scientific & Technical ; Wiley.

Παραπομπή σε μορφή Chicago (17η εκδ.)

Bahri, Abbas. Critical Points at Infinity in Some Variational Problems. Harlow, Essex, England : New York: Longman Scientific & Technical ; Wiley, 1989.

Παραπομπή σε μορφή MLA (8th εκδ.)

Bahri, Abbas. Critical Points at Infinity in Some Variational Problems. Longman Scientific & Technical ; Wiley, 1989.