Butterfield, Herbert
The Free Press , 1957
Buku Teks
Hutten, Ernest H.
Greenwood Press, 1978
Buku Teks
Kuhn, Thomas S., author
Remaja Rosdakarya, 1993
Buku Teks
Kuhn, Thomas S., author
Rosda, 2012
Buku Teks
Broad, C.D., author
Littlefield, Adams, 1959
Buku Teks