edited by Alan Gilbert
John Wiley & Sons, 1978
Buku Teks
Fryer, D.W., author
McGraw-Hill, 1965
Buku Teks
Griffin, Keith B., author
Addison-Wesley, 1970
Buku Teks
The The University of Chicago
The University of Chicago Press, 1972
Buku Teks
Lewis, William Arthur, 1915-, author
Harper & Row, 1966
Buku Teks