Hitchcock, A. S. (1935). Manual of the grasses of the United States. Department of Agriculture.
Chicagoスタイル(17版)引用形式Hitchcock, A. S. Manual of the Grasses of the United States. Washington, D.C, USA: Department of Agriculture, 1935.
MLA(9版)引用形式Hitchcock, A. S. Manual of the Grasses of the United States. Department of Agriculture, 1935.
警告: この引用は必ずしも正確ではありません.