J. Winardi
Entrepreneur & entrepreneurship
Kencana Prenada Media, 2004
 Buku Teks SO
J. Winardi
Entrepreneur & entrepreneurship
Kencana Prenada Media, 2015
 Buku Teks SO
Richmond, Wendy
Design & technology: erasing the boundaries
Van Nostrand Reinhold, 1990
 Buku Referensi
Prince, Thomas R.
Extension the boundaries of accounting theory
South-Western Publishing, 1963
 Buku Teks
Bruhn, John G.
Managing boundaries in the health professions
Charles C. Thomas, 1993
 Buku Teks