Andrew I. Cohen, Christopher Heath Wellman.
Wiley Blackwell, 2014
Buku Teks
Andrew I. Cohen: Christopher Health Well,am
Blackwell, 2005
Buku Teks
Artikel Jurnal
edited by Donald F. Kuratko, Sherry Hoskinson
Emerald, 2017
eBooks
edited, John B. Williamson, Linda Evans and Michael Rustad
Little, Brown, 1985
Buku Teks