O`Neil, L. Peat, author
Writer's Digest Books, 1995
Buku Teks
Kaelany H.D., author
Midada Rahma Press, 2012
Buku Teks
Marzuki Usman, author
HL, 1999
Buku Teks
Azmi Ab Rahman, author
Mind Educate Resources, 2010
Buku Referensi
Malaysia. Kuala Lumpur Tourism Association
Kuala Lumpur Tourism Association, 2010
Buku Referensi