Rien T. Segers, editor
Springer International Publishing, 2016
eBooks
Luthans, Fred, author
McGraw-Hill , 2015
Buku Teks
Deresky, Helen
Prentice-Hall, 2000
Buku Teks
Shubin, John A., author
Barnes & Noble, 1975
Buku Teks
Lucas, Chester L.
McGraw-Hill, 1986
Buku Teks