Routledge, 1996
Buku Teks
Feri Suprapto, author
Fakultas Ekonomi dan Bisnis Universitas Indonesia, 2018
UI - Tesis (Membership)
Candela, Guido, author
[Springer, ], 2012
eBooks
Universitas Pancasila. Fakultas Pariwisata, {s.a.}
Majalah, Jurnal, Buletin
Mill, Robert Christie, author
Prentice-Hall, 1990
Buku Teks