Thompson, Charles L.
Broooks/Cole, 1996
Buku Teks
Thompson, Charles L.
Brooks/Cole Pub., 1983
Buku Teks
Gardner, Richard A.
Jason Aronson Inc., 1993
Buku Teks
McCandless, Boyd R
Holt Reinhard and Winston, 1967
Buku Teks
Bakwin, Harry
Saunders, 1972
Buku Teks