McKay, S. (2023). The hidden history of code-breaking: The secret world of cyphers, uncrackable codes, and elusive encryptions (First Pegasus Books cloth edition.). Pegasus Books.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)McKay, Sinclair. The Hidden History of Code-breaking: The Secret World of Cyphers, Uncrackable Codes, and Elusive Encryptions. First Pegasus Books cloth edition. New York: Pegasus Books, 2023.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)McKay, Sinclair. The Hidden History of Code-breaking: The Secret World of Cyphers, Uncrackable Codes, and Elusive Encryptions. First Pegasus Books cloth edition. Pegasus Books, 2023.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.