Chruden, Herbert J.
South-Western, 1984
Buku Referensi
Gomez-Mejia, Luis R.
Pearson Education, 2016
Buku Teks
Jackson, Susan E.
South Westh Western College, 2000
Buku Teks
Greenlaw, Paul S.
Harper & Row, 1986
Buku Teks
Greenberg, Jerald
Pearson Education International, 2003
Buku Teks