Gaya APA

Gillespie, J., Nehring, R. (2012). Comparing economic performance of organic and conventional U.S. beef farms using matching samples (57, 2012). : The Australian Journal of Agricultural and Resource Economics.

Gaya MLA

Gillespie, Jeffrey., Nehring, Richard. "Comparing economic performance of organic and conventional U.S. beef farms using matching samples". 57, 2012 : The Australian Journal of Agricultural and Resource Economics, 2012. e-journal.