ROHRSCHEIDT, Armin Mikos von. The Behaviour and Preferences of Foreign Tourists using the Services of Guides in Poznań in 2011-2013. Studia Oeconomica Posnaniensia, Poznan, Polska, v. 2, n. 3, p. 154–178, 2014. DOI: 10.18559/h59g7r73. Disponível em: https://journals.ue.poznan.pl/soep/article/view/3225. Acesso em: 3 sep. 2026.