APA (7th ed.) Citation

Unwin, W. C. (1912). The elements of machine design .. (New & rev. ed.). Longmans, Green, and Co..

Chicago Style (17th ed.) Citation

Unwin, William Cawthorne. The Elements of Machine Design .. New & rev. ed. London, New York [etc.]: Longmans, Green, and Co., 1912.

MLA (9th ed.) Citation

Unwin, William Cawthorne. The Elements of Machine Design .. New & rev. ed. Longmans, Green, and Co., 1912.