Budiansky, S. (2005). Her majesty's spymaster: Elizabeth I, Sir Francis Walsingham, and the birth of modern espionage. Viking.
Chicago Style (17th ed.) CitationBudiansky, Stephen. Her Majesty's Spymaster: Elizabeth I, Sir Francis Walsingham, and the Birth of Modern Espionage. New York: Viking, 2005.
MLA (9th ed.) CitationBudiansky, Stephen. Her Majesty's Spymaster: Elizabeth I, Sir Francis Walsingham, and the Birth of Modern Espionage. Viking, 2005.
Warning: These citations may not always be 100% accurate.