Schaefer, D. A. (1970). Reflections on the present and future. Zurich: The Union Bank of Switzerland.
استشهاد بنمط شيكاغوSchaefer, Dr. A. Reflections On the Present and Future. Zurich: The Union Bank of Switzerland, 1970.
MLA استشهادSchaefer, Dr. A. Reflections On the Present and Future. Zurich: The Union Bank of Switzerland, 1970.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.