" Singh, S. The code book: The secret history of codes and code-breaking. Forth Estate Ltd.
Chicago (17e ed.) Bronvermelding" Singh, Simon". The Code Book: The Secret History of Codes and Code-breaking. Forth Estate Ltd.
MLA (9e ed.) Bronvermelding" Singh, Simon". The Code Book: The Secret History of Codes and Code-breaking. Forth Estate Ltd.
Let op: Deze citaties zijn niet altijd 100% accuraat.