World Book, I. (1996). The world book encyclopedia: W- x-y-z. World Book.
Chicago Style (17th ed.) CitationWorld Book, Inc. The World Book Encyclopedia: W- X-y-z. Chicago: World Book, 1996.
MLA引文World Book, Inc. The World Book Encyclopedia: W- X-y-z. World Book, 1996.
警告:這些引文格式不一定是100%准確.