Hobbs, G. M. (1972). Practical mathematics (3rd.ed.). American technical.
Chicagoスタイル(17版)引用形式Hobbs, Glen M. Practical Mathematics. 3rd.ed. Illinois: American technical, 1972.
MLA(9版)引用形式Hobbs, Glen M. Practical Mathematics. 3rd.ed. American technical, 1972.
警告: この引用は必ずしも正確ではありません.