APA引文

Helakoski, L., & Harper, L. (2008). Woolbur. HarperCollins Childrens Books.

Chicago Style (17th ed.) Citation

Helakoski, Leslie, and Lee Harper. Woolbur. New York: HarperCollins Childrens Books, 2008.

MLA引文

Helakoski, Leslie, and Lee Harper. Woolbur. HarperCollins Childrens Books, 2008.

警告：這些引文格式不一定是100％准確.