Wenwerth, George
Ginn and Co., 1914
Buku Teks
Pignani, Tullio J., author
Harcourt, Brace, and World, 1968
Buku Teks
Cameron, Edward A., author
Reynal & Hitchock, 1941
Buku Teks
Kuechle, Richard T., author
Wadsworth, 1984
Buku Teks
Gibilisco, Stan, 1953-, author
McGraw-Hill, 2012
Buku Teks