Singapore Tourist Promotion Board. Research Dept. (1976). Pleasure/vacation visitors from Hong Kong to Singapore, with special reference to visitors on group tours. Singapore Tourist Promotion Board.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Singapore Tourist Promotion Board. Research Dept. Pleasure/vacation Visitors from Hong Kong to Singapore, with Special Reference to Visitors on Group Tours. Singapore: Singapore Tourist Promotion Board, 1976.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Singapore Tourist Promotion Board. Research Dept. Pleasure/vacation Visitors from Hong Kong to Singapore, with Special Reference to Visitors on Group Tours. Singapore Tourist Promotion Board, 1976.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.