Fitzgerald, Robert, 1959-, author
Cambridge University Press, 2015
Buku Teks
Rien T. Segers, editor
Springer International Publishing, 2016
eBooks
Turner, Louis
Hamish Hamilton , 1970
Buku Teks
Michael R. Czinkota, Ronkainen Ilkka A., Michael H.Moffett, Eugene O. Moynihan, ... [et al.].
Harcourt College publishers, 2001
Buku Teks
Pettinger, Richard, author
Capstone Publishing, 2002
Buku Teks