Tresch, Richard W.
Business Publications ; Georgetown, Ont. : Irwin-Dorsey, 1981.
Buku Teks
Ulbrich, Holley H.
Taylor and Francis, 2013
Buku Teks
Hicks, Ursula K.
Kinokuniya , 1959
Buku Teks
edited by Carl S. Shoup
Aldine Publishing, 1969
Buku Teks
Rosen, Harvey S.
McGraw-Hill, 2010
Buku Teks