Fraine, Harold G.
Richard D. Irwin, Inc. , 1962
Buku Teks
Black, Kenneth, author
Prentice-Hall, 1988
Buku Teks
Black, Kenneth, author
Prentice-Hall, 2000
Buku Teks
White, Edwin H.
Prentice-Hall, 1949
Buku Teks
Harrington, Michael, author
Jones & Bartlett Learning, 2015
Buku Teks