Robbins, Stephen P., author
Pearson, 2016
Buku Teks
Robbins, Stephen P., author
Prentice-Hall, 2002
Buku Teks
Koontz, Harold, author
Erlangga, 1980
Buku Teks
Robbins, Stephen P., author
Prentice-Hall, 2009
Buku Teks
Roy, Robert H., author
John Hopkins Press, 1958
Buku Teks