Seminar on Travel and Tourism Stresa, Italy, & European Society for Opinion and Marketing Research. (1977). Seminar on "Travel and Tourism", Stresa, 19th-22nd October, 1977. European Society for Opinion and Marketing Research Association.
Lua i Stíl Chicago (17ú heag.)Seminar on Travel and Tourism Stresa, Italy, agus European Society for Opinion and Marketing Research. Seminar on "Travel and Tourism", Stresa, 19th-22nd October, 1977. Amsterdam: European Society for Opinion and Marketing Research Association, 1977.
Lua MLA (9ú heag.)Seminar on Travel and Tourism Stresa, Italy, agus European Society for Opinion and Marketing Research. Seminar on "Travel and Tourism", Stresa, 19th-22nd October, 1977. European Society for Opinion and Marketing Research Association, 1977.