[1] Gdynia Maritime Univ Gdynia, Fac Entrepreneurship & Commod Sci, Dept Tourism & Hotel Management, Gdynia, Poland
[2] Gdynia Maritime Univ Gdynia, Fac Entrepreneurship & Commod Sci, Dept Commod & Qual Management, Gdynia, Poland
[3] Gdynia Maritime Univ Gdynia, Fac Entrepreneurship & Commod Sci, Dept Trade & Serv, Gdynia, Poland