APA (7th ed.) Citation

Hershey, H. E. (1919). Automatic telephone practice (2d ed.). H.E. Hershey.

Chicago Style (17th ed.) Citation

Hershey, Harry Ellis. Automatic Telephone Practice. 2d ed. Chicago: H.E. Hershey, 1919.

MLA (9th ed.) Citation

Hershey, Harry Ellis. Automatic Telephone Practice. 2d ed. H.E. Hershey, 1919.