Wrench, David F.
McGraw-Hill, 1969
Buku Teks
Haslam, Alexander
Sage Publishing, 2001
Buku Teks
Archibald, W. Peter (William Peter), 1943-
McGraw-Hill Ryerson, 1978
Buku Teks
DeLamater, John D.
Colorado Westview Press, 2014
Buku Teks
Taylor, Shelley E.
Prentice-Hall, 1997
Buku Teks