Παραπομπή σε μορφή APA (7η εκδ.)

National Seminar on Petrochemicals Karachi, Pakistan, & Pakistan Institute of Chemical Engineers. (1981). National Seminar on Petrochemicals, April 12 & 13, 1981, Karachi. The Institute.

Παραπομπή σε μορφή Chicago (17η εκδ.)

National Seminar on Petrochemicals Karachi, Pakistan, και Pakistan Institute of Chemical Engineers. National Seminar on Petrochemicals, April 12 & 13, 1981, Karachi. Karachi: The Institute, 1981.

Παραπομπή σε μορφή MLA (8th εκδ.)

National Seminar on Petrochemicals Karachi, Pakistan, και Pakistan Institute of Chemical Engineers. National Seminar on Petrochemicals, April 12 & 13, 1981, Karachi. The Institute, 1981.