APA引文

LearningExpress (Organization). (1999). Pass the U.S. citizenship exam. Learning Express.

Chicago Style (17th ed.) Citation

LearningExpress (Organization). Pass the U.S. Citizenship Exam. New York: Learning Express, 1999.

MLA引文

LearningExpress (Organization). Pass the U.S. Citizenship Exam. Learning Express, 1999.

警告：這些引文格式不一定是100％准確.