Callahan, Robert E., author
Charles E. Merrill, 1988
Buku Teks
Chruden, Herbert J., author
South-Western, 1984
Buku Referensi
Gomez-Mejia, Luis R., author
Pearson Education, 2016
Buku Teks
Jackson, Susan E., author
South Westh Western College, 2000
Buku Teks
Greenlaw, Paul S., author
Harper & Row, 1986
Buku Teks