Kemmerer, Donald L., author
Littlefield, Adams, 1956
Buku Teks
Sydney : Sydney University Press
Majalah, Jurnal, Buletin
Zanden, Jan Luiten van, author
Routledge, 2012
Buku Teks
edited by Christopher Hanes, Susan Wolcott
Emerald, 2016
eBooks
edited by Warren J. Samuels, Jeff E. Biddle, John B. Davis
Blackwell, 2003
Buku Teks