Gray, B., & Van Milligen, J. (1991). Tips on making greeting cards. Design Press.
芝加哥风格引文Gray, Bill, 与 Jan Van Milligen. Tips on Making Greeting Cards. New York: Design Press, 1991.
MLA引文Gray, Bill, 与 Jan Van Milligen. Tips on Making Greeting Cards. Design Press, 1991.
警告：这些引文格式不一定是100％准确.