MLA

Davies, Mansel. The Physical Principles of Gas Liquefaction and Low Temperature Rectification. London: Longmans, Green and Co., 1949.

APA

Davies, M. (1949). The physical principles of gas liquefaction and low temperature rectification. London: Longmans, Green and Co.

Chicago

Davies, Mansel The Physical Principles of Gas Liquefaction and Low Temperature Rectification. London: Longmans, Green and Co., 1949.