APA引文

Keller, H. (2007). Help!: A story of friendship. Greenwillow Books.

Chicago Style (17th ed.) Citation

Keller, Holly. Help!: A Story of Friendship. [New York, N.Y.]: Greenwillow Books, 2007.

MLA引文

Keller, Holly. Help!: A Story of Friendship. Greenwillow Books, 2007.

警告：這些引文格式不一定是100％准確.