Não informado. Association of Engineering Geologists newsletter. Association of Engineering Geologists.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Não informado. Association of Engineering Geologists Newsletter. Lawrence, Kan: Association of Engineering Geologists.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Não informado. Association of Engineering Geologists Newsletter. Association of Engineering Geologists.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.