Horton, Paul B., author
Appleton-Century-Crofts, 1955
Buku Teks
edited, John B. Williamson, Linda Evans and Michael Rustad
Little, Brown, 1985
Buku Teks
Lauffer, Armand, author
Sage, 1987
Buku Teks
Natarajan, A.
Asia Publishing House, 1959
Buku Teks
Dange, Sindhu S.
A anta Publications, 1984
Buku Teks