توثيق جمعية علم النفس الأمريكية APA (الطبعة السابعة)

National Library (Singapore). Young People's Service. (1993). Window to the sky. Young People's Service, National Library, Singapore, Macmillan/McGraw-Hill.

توثيق أسلوب شيكاغو (الطبعة السابعة عشر)

National Library (Singapore). Young People's Service. Window to the Sky. Singapore : New York: Young People's Service, National Library, Singapore, Macmillan/McGraw-Hill, 1993.

توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)

National Library (Singapore). Young People's Service. Window to the Sky. Young People's Service, National Library, Singapore, Macmillan/McGraw-Hill, 1993.