Singapore Book Publishers Association. Directory of members - Singapore Book Publishers Association. Singapore Book Publishers Association.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Singapore Book Publishers Association. Directory of Members - Singapore Book Publishers Association. [Singapore]: Singapore Book Publishers Association.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Singapore Book Publishers Association. Directory of Members - Singapore Book Publishers Association. Singapore Book Publishers Association.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.