Kiernan, Matthew J.
American Management Association;, 2009
eBooks
Adler, Bill
Jones-Irwin, 1985
Buku Teks
Ripley, William Z.
Little, Brown, and Company, 1927
Buku Teks
Pessin, Allan H.
Business One Irwin, 1990
Buku Referensi
Baruch, Hurd
Acropolis Books ltd., 1971
Buku Teks