Παραπομπή σε μορφή APA (7η εκδ.)

Zietz, J. (1988). Agriculture in the GATT: An analysis of alternative approaches to reform. International Food Policy Research Institute.

Παραπομπή σε μορφή Chicago (17η εκδ.)

Zietz, Joachim. Agriculture in the GATT: An Analysis of Alternative Approaches to Reform. Washington, D.C: International Food Policy Research Institute, 1988.

Παραπομπή σε μορφή MLA (9th εκδ.)

Zietz, Joachim. Agriculture in the GATT: An Analysis of Alternative Approaches to Reform. International Food Policy Research Institute, 1988.