edited Scott G. Mcnall
Little, Brown, 1968
Buku Teks
Wright, Charles Robert, author
Random House, 1975
Buku Teks
Grindstaff, Carl F., author
Christopher Publishing House, 1981
Buku Teks
Kinloch, Graham C., author
Prentice-Hall, 1981
Buku Teks
Ritzer, George, author
Buku Teks