Kunstler, Mort, author
Harry N. Abrams, 1986
Buku Referensi
Beard, Charles A., author
Macmillan, 1942
Buku Teks
edited by Henrietta M. Smith
[American Management Association, ], 2009
eBooks
Carmelo & Bauermann, 1980
Buku Teks
Carmelo & Bauermann, 1981
Buku Teks