Gaya APA

Institute, A, P. (1968). Flowing Wells Book 4: Control Of Operatios Of Flowing Wells (1968). : New York : American Petroleum Institute,.

Gaya MLA

Institute, American, Petroleum. "Flowing Wells Book 4: Control Of Operatios Of Flowing Wells". 1968 : New York : American Petroleum Institute,, 1968. Text.