The bell system, technical journal, Devoted to the scientic and engineering aspects of electrical communication.

MLA

Clarke, Beverly L, H. W Hermance, and A. D Knowlton. The Bell System, Technical Journal, Devoted to the Scientic and Engineering Aspects of Electrical Communication. New York: American Telephone and telegraph company, 1936.

APA

Clarke, B. L, Hermance, H. W, & Knowlton, A. D. (1936). The bell system, technical journal, Devoted to the scientic and engineering aspects of electrical communication. New York: American Telephone and telegraph company.

Chicago

Clarke, Beverly L., H. W Hermance, and A. D Knowlton. The Bell System, Technical Journal, Devoted to the Scientic and Engineering Aspects of Electrical Communication. New York: American Telephone and telegraph company, 1936.