ebrary, Inc, & Stern, A. (2001). Our universe: The thrill of extragalactic exploration as told by leading experts. Cambridge University Press.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)ebrary, Inc, و Alan Stern. Our Universe: The Thrill of Extragalactic Exploration as Told by Leading Experts. Cambridge UK ; New York, NY: Cambridge University Press, 2001.
توثيق جمعية اللغة المعاصرة MLA (الإصدار التاسع)ebrary, Inc, و Alan Stern. Our Universe: The Thrill of Extragalactic Exploration as Told by Leading Experts. Cambridge University Press, 2001.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.