एपीए उद्धरण

Bernd Schubert. (1991). A logical framework for planning agricultural research programs. Philippines: IRRI.

शिकागो स्टाइल उद्धरण

Bernd Schubert. A Logical Framework for Planning Agricultural Research Programs. Philippines: IRRI, 1991.

एमएलए उद्धरण

Bernd Schubert. A Logical Framework for Planning Agricultural Research Programs. Philippines: IRRI, 1991.