1.		Sightseeing tourists' motivation and satisfaction / Elizaberth L. Dunn Ross, Seppo E. Iso-Ahola Autor: Ross, Elizabeth L. Dunn Coautor: ; Iso-Ahola, Seppo E.
2.		Psychological nature of leisure and tourism experience / Roger C. Mannell, Seppo E. Iso-Ahola Autor: Mannell, Roger C. Coautor: ; Iso-Ahola, Seppo E.