APA (7th ed.) Citation

Langsdorf, A. S. (1959). Principles of direct-current machines (6th ed.). McGraw-Hill.

Chicago Style (17th ed.) Citation

Langsdorf, Alexander Suss. Principles of Direct-current Machines. 6th ed. New York: McGraw-Hill, 1959.

MLA (9th ed.) Citation

Langsdorf, Alexander Suss. Principles of Direct-current Machines. 6th ed. McGraw-Hill, 1959.