Petrick, M., & Weingarten, P. (2004). The role of agriculture in Central and Eastern European rural development: engine of change or Social buffer?: Studies on the agricultural and food sector in Central and Eastern Europe. Vol. 25.
Lua i Stíl Chicago (17ú heag.)Petrick, Martin, agus Peter Weingarten. The Role of Agriculture in Central and Eastern European Rural Development: Engine of Change or Social Buffer?: Studies on the Agricultural and Food Sector in Central and Eastern Europe. Vol. 25. 2004.
Lua MLA (9ú heag.)Petrick, Martin, agus Peter Weingarten. The Role of Agriculture in Central and Eastern European Rural Development: Engine of Change or Social Buffer?: Studies on the Agricultural and Food Sector in Central and Eastern Europe. Vol. 25. 2004.