Jenkins, John R.G., author
Pergamon Press, 1972
Buku Teks
Chaousis, Linda, author
Prentice-Hall, 200
Buku Teks
edited by Katherine A. Sloman, Rod W. Wilson, Sigal Balshine
Elsevier , 2006
Buku Teks
Rose, Sheldon D., author
Prentice-Hall, 1977
Buku Teks
edited by Peter Slater and R. McNeill Alexander
Grolier International, 1986
Buku Referensi