Dean, Vera Micheles
Alfred.A.Knopf, 1950
Buku Teks
Humphrey, Don D., author
Frederick A. Praeger , 1962
Buku Teks
Kitzinger, Uwe W., author
Frederick A. Praeger, 1963
Buku Teks
Aggarwal, Vinod K.
Springer, 2012
eBooks
McGovern, Edmond, author
Globefield Press, 1982
Buku Teks