Παραπομπή σε μορφή APA (7η εκδ.)

Levan, N., & Saeks, R. (1977). Operator Theory of Networks and Systems (1977): International Symposium August 17-19, 1977. Western Periodicals Co.

Παραπομπή σε μορφή Chicago (17η εκδ.)

Levan, N., και R. Saeks. Operator Theory of Networks and Systems (1977): International Symposium August 17-19, 1977. N. Hollywood CA: Western Periodicals Co, 1977.

Παραπομπή σε μορφή MLA (8th εκδ.)

Levan, N., και R. Saeks. Operator Theory of Networks and Systems (1977): International Symposium August 17-19, 1977. Western Periodicals Co, 1977.