एपीए उद्धरण

(1976). Project based research: (in progress) 1976-77. Kerala Agricultural University.

शिकागो स्टाइल उद्धरण

Project Based Research: (in Progress) 1976-77. Mannuthy: Kerala Agricultural University, 1976.

एमएलए उद्धरण

Project Based Research: (in Progress) 1976-77. Kerala Agricultural University, 1976.