Hutton, Peter, author
Apa Productions (HK, 1974
Buku Referensi
Schildt, Herbert, author
McGraw-Hill, 2012
Buku Teks
[T.t.] West-Java Regional Touris Development Board [t.th.]
Buku Teks
Downey, Tim, author
Springer-Verlag, 2012
eBooks
Gospodnetic, Otis, author
Manning Pubcations Co., 2005
Buku Teks