APA

Gas Processors Association G., . (1980). Natural gasoline specifications and test methods. Tulsa, Oklahoma: Gas Processors Association, GPA.

Chicago

Gas Processors Association GPA, . 1980. Natural gasoline specifications and test methods. Tulsa, Oklahoma: Gas Processors Association, GPA.

Harvard

Gas Processors Association G., . (1980). Natural gasoline specifications and test methods. Tulsa, Oklahoma: Gas Processors Association, GPA.

MLA

Gas Processors Association GPA, . Natural gasoline specifications and test methods. Tulsa, Oklahoma: Gas Processors Association, GPA. 1980.