Ball, R. S. (1892). Star-Land: Being talks with young people about the wonders of the hevens. London: Casssell & Company.
استشهاد بنمط شيكاغوBall, Robert Stawell. Star-Land: Being Talks With Young People About the Wonders of the Hevens. London: Casssell & Company, 1892.
MLA استشهادBall, Robert Stawell. Star-Land: Being Talks With Young People About the Wonders of the Hevens. London: Casssell & Company, 1892.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.