Jordan, Philip B., author
McGraw-Hill, 1969
Buku Referensi
Houghton Miffiln, 1993
Buku Referensi
Guttridge, Bryan, author
John Wiley & Sons, 1973
Buku Teks
Rijanto Tosin, author
Dinastindo, 1991
Buku Referensi
Longbottom, Roy, author
John Wiley & Sons, 1980
Buku Teks