APA (7th ed.) Citation

Evans, J. (1986). OPEC, its member states and the world energy market / compiled and written by John Evans. Longman.

Chicago Style (17th ed.) Citation

Evans, John. OPEC, Its Member States and the World Energy Market / Compiled and Written by John Evans. Harlow: Longman, 1986.

MLA (9th ed.) Citation

Evans, John. OPEC, Its Member States and the World Energy Market / Compiled and Written by John Evans. Longman, 1986.

Warning: These citations may not always be 100% accurate.