Richard D. Irwin, Inc., 1958
Buku Teks
Burgess, Giles H., author
Prentice-Hall, 1989
Buku Teks
Burgess, Giles H., author
Prentice-Hall, 1989
Buku Teks
Baldwin, William Lee, author
Richard D. Irwin, 1987
Buku Teks
Princenton University Press , 1965
Buku Teks