APA引文

Amy Shields. (2011). National Geographic Readers: Trains. National Geographic Children's Books.

Chicago Style (17th ed.) Citation

Amy Shields. National Geographic Readers: Trains. National Geographic Children's Books, 2011.

MLA引文

Amy Shields. National Geographic Readers: Trains. National Geographic Children's Books, 2011.

警告：這些引文格式不一定是100％准確.