APA (7th ed.) Citation

Systems, H. E. (1990). Digital techniques: Book 1. Heath Co..

Chicago Style (17th ed.) Citation

Systems, Heathkit Educational. Digital Techniques: Book 1. Benton Harbor, Mich.: Heath Co., 1990.

MLA (9th ed.) Citation

Systems, Heathkit Educational. Digital Techniques: Book 1. Heath Co., 1990.