McGuire, Joseph W., author
Prentice-Hall, 1964
Buku Teks
Summer, Charles E., author
Little, Brown, 1980
Buku Teks
Griffin, Ricky W., author
Pearson Education International, 2006
Buku Teks
Griffin, Ricky W., author
Prentice-Hall, 1999
Buku Teks
Griffin, Ricky W., author
Prentice-Hall, 2002
Buku Teks