Gressel, J. (2005). Crop ferality and volunteerism. New York: Taylor and Francis.
Trích dẫn kiểu ChicagoGressel, Jonathan. Crop Ferality and Volunteerism. New York: Taylor and Francis, 2005.
Deismireacht MLAGressel, Jonathan. Crop Ferality and Volunteerism. New York: Taylor and Francis, 2005.
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