APA

Gas Processors Association G., . (1965). GPA standard for determination of hydrogen sulfide and mercaptan sulfur in natural gas (cadmium sulfate-lodometric titration method). Tulsa, Oklahoma: Gas Processors Association, GPA.

Chicago

Gas Processors Association GPA, . 1965. GPA standard for determination of hydrogen sulfide and mercaptan sulfur in natural gas (cadmium sulfate-lodometric titration method). Tulsa, Oklahoma: Gas Processors Association, GPA.

Harvard

Gas Processors Association G., . (1965). GPA standard for determination of hydrogen sulfide and mercaptan sulfur in natural gas (cadmium sulfate-lodometric titration method). Tulsa, Oklahoma: Gas Processors Association, GPA.

MLA

Gas Processors Association GPA, . GPA standard for determination of hydrogen sulfide and mercaptan sulfur in natural gas (cadmium sulfate-lodometric titration method). Tulsa, Oklahoma: Gas Processors Association, GPA. 1965.