APA
Gas Processors Association G., . (1998). Tentative method for the determination of ethyl mercaptan in LP-Gas using length of stain tubes. Tulsa, Oklahoma: Gas Processors Association, GPA.
Chicago
Gas Processors Association GPA, . 1998. Tentative method for the determination of ethyl mercaptan in LP-Gas using length of stain tubes. Tulsa, Oklahoma: Gas Processors Association, GPA.
Harvard
Gas Processors Association G., . (1998). Tentative method for the determination of ethyl mercaptan in LP-Gas using length of stain tubes. Tulsa, Oklahoma: Gas Processors Association, GPA.
MLA
Gas Processors Association GPA, . Tentative method for the determination of ethyl mercaptan in LP-Gas using length of stain tubes. Tulsa, Oklahoma: Gas Processors Association, GPA. 1998.