Gay, Phillip T., author

McGraw-Hill, 2001

 Buku Teks

Kimble, George H.T.

The Twentieth Century Fund, 1960

 Buku Teks

Routledge, 1995

 Buku Teks

Saul, John S., author

Monthly Review Press, 1981

 Buku Teks

Stephan Pauleit, Adrien Coly, Sandra Fohlmeister, Paolo Gasparini, Gertrud Jorgenses, Sigrun Kabisch, Wilbard J. Komb, Sarah Lindley, Ingo Simonis, Kumelachew Yeshitela, editors

Springer, 2015

 Buku Teks