APA citiranje

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

Trích dẫn kiểu Chicago

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

MLA citiranje

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

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