Paige, Jeffery M., author
Pedati, 2004
Buku Teks
Howard, Tiffiany, author
Palgrave Macmillan, 2016
Buku Teks
McGraw-Hill Book , 1975
Buku Teks
edited by Swasti Mitter and Sheila Rowbotham
Routledge, 1995
Buku Teks
with a pref. by Robert S. McNamara
The John Hopkins University Press , 1975
Buku Teks