Johnson, Marilyn, Author
an imprint of Harper Collins Publishers, 2014
Buku Teks
Heilbroner, Robert L., author
Simon Schuster, 1961
Buku Teks
Fukuyama, Francis, author
Profile Books, 1999
Buku Teks
edited by Robert M. MacIver
Institute for Religious and Social Studies, 1950
Buku Teks
De Blij, Harm J., author
John Wiley & Sons, 1977
Buku Teks