Παραπομπή APA

Wetherbe, J. C. (1990). Systems analysis and design (Ed.3.).

Παραπομπή Chicago Style

Wetherbe, James C. Systems Analysis and Design. Ed.3. New Delhi, Galgotia Publications, 1990.

Παραπομπή MLA

Wetherbe, James C. Systems Analysis and Design. Ed.3. 1990.