Hitchcock, G., & Nielsen, S. (2020). The gray chamber, historical stories of american crime: True colors: historical stories of american crime series, book 4 (Unabridged.). Recorded Books Inc..
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Hitchcock, Grace, و Stina Nielsen. The Gray Chamber, Historical Stories of American Crime: True Colors: Historical Stories of American Crime Series, Book 4. Unabridged. Prince Frederick: Recorded Books Inc., 2020.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Hitchcock, Grace, و Stina Nielsen. The Gray Chamber, Historical Stories of American Crime: True Colors: Historical Stories of American Crime Series, Book 4. Unabridged. Recorded Books Inc., 2020.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.