Levin, Jack, author
Harper Collins, 1991
Buku Teks
Levin, Jack, author
Harper & Row, 1973
Buku Teks
Johnson, Robert, author
PWS-Kent, 1984
Buku Teks
Hoel, Paul Gerhard, 1905-, author
John Wiley & Sons, 1962
Buku Teks
Bowley, Arthur, author
Staples Press, 1948
Buku Teks