APA引文

Không rõ. (2001). About Customers: Gathering Information. Youth PublishingHouse.

Trích dẫn kiểu Chicago

Không rõ. About Customers: Gathering Information. Youth PublishingHouse, 2001.

MLA引文

Không rõ. About Customers: Gathering Information. Youth PublishingHouse, 2001.

警告：这些引文格式不一定是100％准确.