Foulke, Roy Anderson, 1896-, author
Tata McGraw-Hill, 1957
Buku Teks
Guthmann, Harry G., author
Prentice-Hall, 1949
Buku Teks
Guthmann, Harry G., author
Prentice-Hall, 1962
Buku Teks
Helfert, Erich A., author
Richard D. Irwin, 1977
Buku Teks
Gibson, Charles H., author
South Western College , 2001
Buku Teks