Day, A. J., & Hoffman, V. (1991). The annual register: A record of world events 1990. Longman.
Chicago Style (17th ed.) CitationDay, Alan J., and Verena Hoffman. The Annual Register: A Record of World Events 1990. London, [England]: Longman, 1991.
MLA引文Day, Alan J., and Verena Hoffman. The Annual Register: A Record of World Events 1990. Longman, 1991.
警告:這些引文格式不一定是100%准確.