Galston, Arthur W.
Prentice-Hall, 1968
Buku Teks
Smith, C. Michael
Springer, 2005
Buku Teks
Agrios, George N.
Academic Press, 1988
Buku Teks
Yasseen, Leonard C.
New York, NY, American Research Council
Buku Teks
Weaver, John E.
McGraw-Hill, 1938
Buku Teks