Gaya APA
Gruppe, henry. (1972).
The truxton cipher .
London, United Kingdom:
Coronet books.
Gaya Chicago
Gruppe, henry.
The truxton cipher.
London, United Kingdom:
Coronet books,
1972.
Text.
Gaya MLA
Gruppe, henry.
The truxton cipher.
London, United Kingdom:
Coronet books,
1972.
Text.
Gaya Turabian
Gruppe, henry.
The truxton cipher.
London, United Kingdom:
Coronet books,
1972.
Print.