Shapiro, Alan C., author
Allyn and Bacon, 1992
Buku Teks
Sethi, S. Prakash, author
Goodyear, 1973
Buku Teks
Griffin, Ricky W., author
Prentice-Hall, 2002
Buku Teks
Griffin, Ricky W., author
Prentice-Hall, 2002
Buku Teks
Griffin, Ricky W., author
Pearson, 2015
Buku Teks