एपीए उद्धरण

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

शिकागो स्टाइल उद्धरण

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

एमएलए उद्धरण

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