Strong, Robert A, author
Thomson/South-Western, 2006
Buku Teks
Farrell, James L., author
McGraw-Hill, 1997
Buku Teks
Jeremmy Erickson, author
2016
UI - Skripsi Membership
Fischer, Donald E., author
Prentice-Hall, 1991
Buku Teks
Cohen, Jerome B., author
Richard D. Irwin, 1987
Buku Teks