Stein, Guido, author
Emerald, 2018
eBooks
Hersey, Paul, author
Pearson, Prentice Hall, 2008
Buku Teks
Robbins, Stephen P., author
Prentice-Hall, 1988
Buku Teks
Greenberg, Jerald, author
Pearson, Prentice Hall, 2008
Buku Teks
Robbins, Stephen P., author
Pearson, 2010
Buku Teks