Gaya APA
Haffert, John M. (1967).
The worlds greatest secret .
New Jersey:
Palgrave Macmillan.
Gaya Chicago
Haffert, John M.
The worlds greatest secret.
New Jersey:
Palgrave Macmillan,
1967.
Text.
Gaya MLA
Haffert, John M.
The worlds greatest secret.
New Jersey:
Palgrave Macmillan,
1967.
Text.
Gaya Turabian
Haffert, John M.
The worlds greatest secret.
New Jersey:
Palgrave Macmillan,
1967.
Print.