APA استشهاد

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

استشهاد بنمط شيكاغو

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

MLA استشهاد

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