1.
Effects of podcast tours on tourist experiences in a national park / Myunghwa Kang, Ulrike Gretzel
Autor:
Myunghwa, Kang
Coautor:
;
Gretzel, Ulrike
2.
Tourism managers' adoption of marketing decision support systems / Karl Wöber W., Ulrike Gretzel
Autor:
Wõber, Karl W.
Coautor:
;
Gretzel, Ulrike