1.		O Turismo Religioso no Norte de Portugal: Avaliação do seu potencial de desenvolvimento Autor: Fernandes, Carlos; Richards, Greg; Rebelo, Marco
2.		The development of cultural tourism and cultural attractions / Greg Richards Autor: Richards, Greg
3.		The market for cultural attractions / Greg Richards Autor: Richards, Greg
4.		Tourism attraction systems: exploring cultural behavior / Greg Richards Autor: Richards, Greg
5.		Youth travel and backpacking / Richards Greg, Brian King Autor: Richards, Greg Coautor: ; King, Brian