Cita APA

Hart, R. (1979). An ecological systems conceptual framework for agricultural research and development.

Chicago Style Citation

Hart, R.D. An Ecological Systems Conceptual Framework for Agricultural Research and Development. 1979.

Cita MLA

Hart, R.D. An Ecological Systems Conceptual Framework for Agricultural Research and Development. 1979.

Atenció: Aquestes cites poden no estar 100% correctes.