(1991). Webster's ninth new collegiate dictionary. Merriam-Webster.
芝加哥风格引文Webster's Ninth New Collegiate Dictionary. .Springfield, Mass., U.S.A: Merriam-Webster, 1991.
MLA引文Webster's Ninth New Collegiate Dictionary. Merriam-Webster, 1991.
警告：这些引文格式不一定是100％准确.