Dewing, Arthur Stone
Ronald Press, 1953
Buku Teks SO
Van Horne, James Carter, 1935-
Prentice-Hall, 1971
Buku Teks
Van Horne, James Carter, 1935-
Prentice-Hall, 1974
Buku Teks
Walker, Ernest W.
Harper & Brothers, 1961
Buku Teks
Van Horne, James Carter, 1935-
Prentice-Hall, 1992
Buku Teks