Burns, James McGregor, author
Prentice-Hall, 1963
Buku Teks
Neal, Harry Edward, author
Julian Messner, 1967
Buku Teks
Good, John M.
Heath , 1970
Buku Teks
Henderson, Gordon G., author
Harper and Rows, 1976
Buku Teks
Eldersveld, Samuel J.
Basic Book inc, 1982
Buku Teks