APA

Gas Processors Association G., . (1991). Liquid densities of ethane, propane, and ethane-propane mixtures. Tulsa, Oklahoma: Gas Processors Association, GPA.

Chicago

Gas Processors Association GPA, . 1991. Liquid densities of ethane, propane, and ethane-propane mixtures. Tulsa, Oklahoma: Gas Processors Association, GPA.

Harvard

Gas Processors Association G., . (1991). Liquid densities of ethane, propane, and ethane-propane mixtures. Tulsa, Oklahoma: Gas Processors Association, GPA.

MLA

Gas Processors Association GPA, . Liquid densities of ethane, propane, and ethane-propane mixtures. Tulsa, Oklahoma: Gas Processors Association, GPA. 1991.