APA (7th ed.) Citation

Grayson, L. E. (1981). National oil companies. Wiley.

Chicago Style (17th ed.) Citation

Grayson, Leslie E. National Oil Companies. Chichester [West Sussex] ; New York: Wiley, 1981.

MLA (8th ed.) Citation

Grayson, Leslie E. National Oil Companies. Wiley, 1981.