APA引文

Palen, S. 1. (2012). Understanding our universe. New York, NY: W.W. Norton.

Trích dẫn kiểu Chicago

Palen, Stacy. 1957-. Understanding Our Universe. New York, NY: W.W. Norton, 2012.

MLA引文

Palen, Stacy. 1957-. Understanding Our Universe. New York, NY: W.W. Norton, 2012.

警告：這些引文格式不一定是100％准確.