Henderson, Carter F., author
Holt, Rinehart and Winston, 1985
Buku Teks
Hisrich, Robert D., author
McGraw-Hill, 2014
Buku Teks
Solovic, Susan Wilson, author
American Management Association, 2008
eBooks
Fitzpatrick, Rob, author
Amazon, 2014
Buku Teks
Hisrich, Robert D., author
McGraw-Hill Education, 2013
Buku Teks