Brand, W.
Free Press, 1958
Buku Teks
edited by Norman N. Barish and Michel Verhulst
Pergamon Press , 1965
Buku Teks
Frederick A. Praeger, 1966
Buku Teks
Nafziger, E. Wayne, author
Prentice-Hall, 1990
Buku Teks
Myint, Hla, author
Hutchinson University Library, 1973
Buku Teks