Dyfyniad APA

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

Dyfyniad Arddull Chicago

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

Dyfyniad MLA

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

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