Viskanta, Tadas
Abnormal returns : winning strategies from the frontlines of the investment blogoshphere
McGraw-Hill, 2012
Buku Teks
Psacharopoulos, George
Returns to investment in education: a global update
World Bank, 1993
Buku Teks
Devore, Jay L.
Statistics : the exploration and analysis of data
Duxbury Press, 1995
Buku Teks
Socio-economic and schooling status of dental undergradustes from six french universities
Artikel Jurnal
Hutchinson, Alfred
Road to Ghana
John Day, 1960
Buku Teks