Sheingold, Abraham
D. Van Nostrand, 1951
Buku Teks
Wentworth, Stuart M.
John Wiley & Sons, 2005
Buku Teks
Zbar, Paul B.
McGraw-Hill, 1993
Buku Referensi
Zbar, Paul B.
Macmillan/McGraw-Hill, 1992
Buku Referensi
Loper, Orla E.
Delmar Publishers, 1991
Buku Teks