Cronin, James E., author
Routledge, 1991
Buku Teks
Datta, Bhabatosh
Tata McGraw-Hill, 1978
Buku Teks
Coates, Benjamin Allen, author
Oxford University Press, 2016
eBooks
edited by Enrico Fels, Jan-Frederik Kremer, Katharina Kronenberg
Springer, 2012
eBooks
Smith, Roy H., author
Routledge, 2017
Buku Teks