Cita APA

Stern, J. P., & Joy P. Stern; Edward S. Stern. (1971). Petrochemicals today. London: E. Arnold.

Chicago Style Citation

Stern, Joy P., i Joy P. Stern; Edward S. Stern. Petrochemicals Today. London: E. Arnold, 1971.

Cita MLA

Stern, Joy P., i Joy P. Stern; Edward S. Stern. Petrochemicals Today. London: E. Arnold, 1971.

Atenció: Aquestes cites poden no estar 100% correctes.