International Young Naturefriends (IYNF). Variety of the Rainbow: Magazine of the International Young Naturefriends. Brussel: International Young Naturefriends.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)International Young Naturefriends (IYNF). Variety of the Rainbow: Magazine of the International Young Naturefriends. Brussel: International Young Naturefriends.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)International Young Naturefriends (IYNF). Variety of the Rainbow: Magazine of the International Young Naturefriends. Brussel: International Young Naturefriends.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.