Ritter, W. (2016). Ghostly echoes (First edition.). Algonquin Young Readers, an imprint of Algonquin Books of Chapel Hill, a division of Workman Publishing.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Ritter, William. Ghostly Echoes. First edition. Chapel Hill, North Carolina: Algonquin Young Readers, an imprint of Algonquin Books of Chapel Hill, a division of Workman Publishing, 2016.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Ritter, William. Ghostly Echoes. First edition. Algonquin Young Readers, an imprint of Algonquin Books of Chapel Hill, a division of Workman Publishing, 2016.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.