edited by Yvonne Marshall
Routledge, 1997
Buku Teks
Kathryn Rountree, Christine Morris, Alan A.D. Peatfield, editor
[Springer, ], 2012
eBooks
Cottrell, Leonard
World Pub., 1964
Buku Teks
Jessup, Ronald
Macdonald, 1968
Buku Teks
edited by Mari Pritchard Parker, Elvio Angeloni
McGraw-Hill, 2013
Buku Teks