Albrecht, Robert L.
John Wiley , 1978
Buku Teks
Gujarati, Damodar N., author
McGraw-Hill, 2009
Buku Teks
Carrington, Gerald, author
Oxford University Press, 1994
Buku Teks
Grob, Bernard, author
McGraw-Hill, 1977
Buku Teks
Ford, Kenneth W.
Blaisdell Publishing, 1968
Buku Teks