APA引文

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

Trích dẫn kiểu Chicago

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

MLA引文

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

警告：這些引文格式不一定是100％准確.