Παραπομπή APA

Bytheway, A., & Edwards, C. (1991). Essence of infromation systems. Prentice-Hall of India Private Limited.

Παραπομπή Chicago Style

Bytheway, Andy, και Chris Edwards. Essence of Infromation Systems. New Delhi: Prentice-Hall of India Private Limited, 1991.

Παραπομπή MLA

Bytheway, Andy, και Chris Edwards. Essence of Infromation Systems. Prentice-Hall of India Private Limited, 1991.