APA (7th ed.) Citation

National Electric Light Association. Overhead Systems Committee. (1927). Overhead systems reference book. National Electric Light Association.

Chicago Style (17th ed.) Citation

National Electric Light Association. Overhead Systems Committee. Overhead Systems Reference Book. New York City: National Electric Light Association, 1927.

MLA (9th ed.) Citation

National Electric Light Association. Overhead Systems Committee. Overhead Systems Reference Book. National Electric Light Association, 1927.