Zbar, Paul B.
Macmillan/McGraw-Hill, 1992
Buku Referensi
Zherebtsov, I.
Mir Publishers, 1969
Buku Teks
Albert, Arthur Lemuel
McGraw-Hill Book Company, Inc., 1943
Buku Teks
Floyd, Thomas L.
Prentice-Hall, 1998
Buku Teks
Wentworth, Stuart M.
John Wiley & Sons, 2005
Buku Teks