Insor, D., author
Frederick A.Praeger, 1963
Buku Teks
Academic Press, 2015
eBooks
by Samuel H. Beer ... [et al.]
Random House, 1965
Buku Teks
edited by Michael Stohl and Harry R. Targ
Schenkman Publishing Company, 1982
Buku Teks
Hague, Rod., author
Palgrave Macmillan , 2013
Buku Teks