Knapp, Daniel R., author
John Wiley & Sons, 1979
Buku Teks
Gibson, William M., author
Pergamon Press , 1980
Buku Teks
Masterson, William L., author
Brooks/Cole, 2009
Buku Teks
Masterton, William L., author
Brooks/Cole, 2009
Buku Teks
Knapp, Daniel R., author
John Wiley & Sons, 1979
Buku Referensi