Reynolds, Fred D.
McGraw-Hill, 1977
Buku Teks
Peter, J. Paul
Erlangga, 1999
Buku Teks
Reynolds, Fred D.
McGraw-Hill, 1977
Buku Teks
Engel, James F.
Chicago Dryden Press, 1990
Buku Teks
Schiffman, Leon G.
Pearson Education International, 2004
Buku Teks