APA استشهاد

Hellerman, H. (1973). Digital computer system principles (Ed.2.). Tata Mc Graw - Hill.

استشهاد بنمط شيكاغو

Hellerman, Herbert. Digital Computer System Principles. Ed.2. New Delhi: Tata Mc Graw - Hill, 1973.

MLA استشهاد

Hellerman, Herbert. Digital Computer System Principles. Ed.2. Tata Mc Graw - Hill, 1973.