APA Style
Ludlum, Robert. (2002).
The Sigma Protocol .
Great Britain:
Yayaan Obor Indonesia.
Chicago Style
Ludlum, Robert.
The Sigma Protocol.
Great Britain:
Yayaan Obor Indonesia,
2002.
Book.
MLA Style
Ludlum, Robert.
The Sigma Protocol.
Great Britain:
Yayaan Obor Indonesia,
2002.
Book.
Turabian Style
Ludlum, Robert.
The Sigma Protocol.
Great Britain:
Yayaan Obor Indonesia,
2002.
Book.