Não informado. (1981). Basic Petroleum Data Book. American Petroleum Institute.
Style de citation Chicago (17e éd.)Não informado. Basic Petroleum Data Book. Washington: American Petroleum Institute, 1981.
Style de citation MLA (8e éd.)Não informado. Basic Petroleum Data Book. American Petroleum Institute, 1981.
Attention : ces citations peuvent ne pas être correctes à 100%.