Jackson, John H., author
MIT Press, 1991
Buku Teks
Little, Ian M.D.
Basic Books , 1982
Buku Teks
Spero, Joan Edelman, author
Wadsworth, 2010
Buku Teks
Hodgson, John S., author
Prentice-Hall, 1983
Buku Teks
Spero, Joan Edelman, author
Routledge, 1994
Buku Teks