Bachmann, S., & Tucholke, A. G. (2023). The secret life of hidden places: Concealed rooms, clandestine passageways, and the curious minds that made them. Workman Publishing.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Bachmann, Stefan, و April Genevieve Tucholke. The Secret Life of Hidden Places: Concealed Rooms, Clandestine Passageways, and the Curious Minds That Made Them. New York, NY: Workman Publishing, 2023.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Bachmann, Stefan, و April Genevieve Tucholke. The Secret Life of Hidden Places: Concealed Rooms, Clandestine Passageways, and the Curious Minds That Made Them. Workman Publishing, 2023.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.