Holloway, Robert J., author
John Wiley & Sons, 1968
Buku Teks
Howard, John A., author
Richard D. Irwin, 1957
Buku Teks
Keegan, Warren J., author
Prentice Hall of India, 1982
Buku Teks
Kelley, Eugene J.
Prentice-Hall, 1965
Buku Teks
Richard D. Irwin, Inc. , 1958
Buku Teks