Deb, Sibnath, author
Sage, 2019
Buku Teks
Hulsey, Nathan, author
Emerald Publishing Limited, 2020
eBooks
Baldwin, John D., 1941-, author
Prentice-Hall, 1986
Buku Teks
Sapirstein, Milton R
A Fawcett Premier Book, 1966
Buku Teks
Inglis, David, author
Routledge, 2005
Buku Teks