Zettel, S. (2013). Palace of spies: Being a true, accurate, and complete account of the scandalous and wholly remarkable adventures of Margaret Preston Fitzroy, counterfeit lady, accused thief, and confidential agent at the court of his majesty, King George I. Houghton Mifflin Harcourt.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Zettel, Sarah. Palace of Spies: Being a True, Accurate, and Complete Account of the Scandalous and Wholly Remarkable Adventures of Margaret Preston Fitzroy, Counterfeit Lady, Accused Thief, and Confidential Agent at the Court of His Majesty, King George I. Boston: Houghton Mifflin Harcourt, 2013.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Zettel, Sarah. Palace of Spies: Being a True, Accurate, and Complete Account of the Scandalous and Wholly Remarkable Adventures of Margaret Preston Fitzroy, Counterfeit Lady, Accused Thief, and Confidential Agent at the Court of His Majesty, King George I. Houghton Mifflin Harcourt, 2013.