Pamuntjak, Laksmi
Djambatan , 2001
Buku Teks
Margen, Sheldon
Rebus Inc, 2002
Buku Teks
Stevenson, Gladys T.
John Wiley & Sons, 1960
Buku Teks
Ensminger, Audrey; Ensminger, M.E.; Konlande, James E.; Robson, John R.K.
CRC Press, 1994
Buku Referensi
Ursell, Amanda
A Dorling Kindersley Book, 2000
Buku Teks