APA Zitierstil

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

Chicago Zitierstil

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

MLA Zitierstil

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

Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.