Araba Kalea:ITXAROPENA,,
Buku Teks
Azmi Ab Rahman
Mind Educate Resources, 2010
Buku Referensi
Bristow, Steve
Tropical Press Sdn Bhd, 1994
Buku Referensi
edited by S. Radhakrishna
Pergamon Press, 1980
Buku Teks
World Express Mapping Sdn. Bhd, [date of publication not identified]
Buku Referensi