edited by J. Karl Nicholas and James R. Nicholl
Allyn and Bacon , 1994
Buku Teks
Dean, Howard H.
Prentice-Hall, 1962
Buku Teks
Bailey, Edward P., author
Charles E. Merrill, 1984
Buku Teks
Trzeciak, John, author
Phoenix, 1997
Buku Teks
Caruso, Domenick, author
W.W. Norton, 1977
Buku Teks