Eric Freedman, Robyn S. Goodman, and Elanie Steyn, editors
Routledge, Taylor & Francis Group, 2018
Buku Teks
Caselli, Marco
Springer, 2012
eBooks
Burton, Graeme, author
McGraw-Hill, 2010
Buku Teks
edited by Walter K. Gordon
Appleton-Century-Crofts, 1968
Buku Teks
edited by M.G. Quibria
Published for the Asian Develoment Bank by Oxford University Press, 1995
Buku Teks