Stahl, S. (2008). A gateway to modern geometry: The Poincare half-plane .-2nd ed (2nd ed.). Jones and Bartlett Publishers.
استشهاد بنمط شيكاغوStahl, Saul. A Gateway to Modern Geometry: The Poincare Half-plane .-2nd Ed. 2nd ed. Boston: Jones and Bartlett Publishers, 2008.
MLA استشهادStahl, Saul. A Gateway to Modern Geometry: The Poincare Half-plane .-2nd Ed. 2nd ed. Jones and Bartlett Publishers, 2008.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.