APA引文

Ludlum, R. (2002). The Sigma protocol (St. Martin's pbk. ed.). St. Martin's Paperbacks.

Chicago Style (17th ed.) Citation

Ludlum, Robert. The Sigma Protocol. St. Martin's pbk. ed. New York: St. Martin's Paperbacks, 2002.

MLA引文

Ludlum, Robert. The Sigma Protocol. St. Martin's pbk. ed. St. Martin's Paperbacks, 2002.

警告：這些引文格式不一定是100％准確.