Flint, Thos
WB Saunders Company, 1958
Buku Teks
Juniper, Richard P., author
Butterworth-Heinemann, 1993
Buku Teks
Mistovich, Joseph J., author
Prentice-Hall, 2000
Buku Teks
edited by Edward K. Chung
Lea & Febiger , 1985
Buku Teks
Stilp, Richard H.
Delmar Publishers, 1997
Buku Teks