MLA

Williams, Hal. Mechanical Refrigeration : Being a Practical Introduction to the Study of Cold Storage, Ice-making, and Other Purposes to Which Refrigeration Is Being Applied. New & enl. ed. London: Pitman, 1933.

APA

Williams, H. (1933). Mechanical refrigeration : being a practical introduction to the study of cold storage, ice-making, and other purposes to which refrigeration is being applied. New & enl. ed. London: Pitman.

Chicago

Williams, Hal. Mechanical Refrigeration: Being a Practical Introduction to the Study of Cold Storage, Ice-Making, and Other Purposes to Which Refrigeration Is Being Applied. New & enl. ed. London: Pitman, 1933.