APA aipamena

Youssef,Leon A. (1975). System Analysis and Design. Reston Publishings.

Chicago Style aipamena

Youssef,Leon A. System Analysis and Design. Reston Publishings, 1975.

MLA aipamena

Youssef,Leon A. System Analysis and Design. Reston Publishings, 1975.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.