Freeman, J. F. (2008). High Plains horticulture: A history. University Press of Colorado.
Chicagoスタイル(17版)引用形式Freeman, John F. High Plains Horticulture: A History. Boulder: University Press of Colorado, 2008.
MLA(9版)引用形式Freeman, John F. High Plains Horticulture: A History. University Press of Colorado, 2008.
警告: この引用は必ずしも正確ではありません.