APA استشهاد

Hellerman, H. (1974). Digital computer system principles (2nd ed.). McGraw-Hill.

استشهاد بنمط شيكاغو

Hellerman, Herbert. Digital Computer System Principles. 2nd ed. New Delhi: McGraw-Hill, 1974.

MLA استشهاد

Hellerman, Herbert. Digital Computer System Principles. 2nd ed. McGraw-Hill, 1974.