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.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Seminar on Travel and Tourism Stresa, Italy, و 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.
توثيق جمعية اللغة المعاصرة MLA (الإصدار التاسع)Seminar on Travel and Tourism Stresa, Italy, و 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.