Cita APA (7a ed.)

Stern, J. P., & Stern, E. S. (1971). Petrochemicals today. Edward Arnold.

Cita Chicago Style (17a ed.)

Stern, Joy P., y Edward S. Stern. Petrochemicals Today. UK: Edward Arnold, 1971.

Cita MLA (8a ed.)

Stern, Joy P., y Edward S. Stern. Petrochemicals Today. Edward Arnold, 1971.