Loxton, John, author
John Wiley & Sons, 1980
Buku Teks
Carrol, Phil, author
New York, N.Y., McGraw-Hill
Buku Teks
Carmichael, A.W., author
Hill Publishing, 1919
Buku Teks
Han, Ying Shiyong, author
[publisher not identified], 1998
Buku Referensi
Mulligan, Joseph F., author
McGraw-Hill , 1980
Buku Teks