THE WORLD BOOK ENCYCLOPEDIA. (1989). The world book encyclopedia: Research guide/index. World Book.
芝加哥风格引文THE WORLD BOOK ENCYCLOPEDIA. The World Book Encyclopedia: Research Guide/index. Chicago: World Book, 1989.
MLA引文THE WORLD BOOK ENCYCLOPEDIA. The World Book Encyclopedia: Research Guide/index. World Book, 1989.
警告：这些引文格式不一定是100％准确.