APA (7th ed.) Citation

Harel, A. (1958). Transistorised private automatic telephone system. P.G. Keller.

Chicago Style (17th ed.) Citation

Harel, Abraham. Transistorised Private Automatic Telephone System. Winterthur: P.G. Keller, 1958.

MLA (8th ed.) Citation

Harel, Abraham. Transistorised Private Automatic Telephone System. P.G. Keller, 1958.

Warning: These citations may not always be 100% accurate.