Chaudhry, Asif
New Jersey : Wiley, 2016
Buku Teks
Friedmann, Wolfgang, 1907-1972
Columbia University Press, 1966
Buku Teks
Madura, Jeff
Thomson South-Western, 2003
Buku Teks
Thomas R Robinson, Elaine Henry, Wendy L. Pirie, Michael A. Broihahn, Anthony T. Cope
John Wiley & Son, 2012
Buku Teks
Lastra, Rosa Maria
Oxford University Pres, 2015
Buku Teks