Trzeciak, John, author
Phoenix, 1997
Buku Teks
Zelman, William N, author
Jossey- Bass, 2009
Buku Teks
Jolly, David, author
Cambridge University Press, 1984
Buku Teks
Shrypck, Harold
Indonesia Publishing House , 1993
Buku Teks
Shryock, Harold, author
Indonesia Publishing House , 1981
Buku Teks