Dyfyniad APA

Tyson, N. d., & Lang, A. (2012). Space chronicles: Facing the ultimate frontier. W.W. Norton.

Dyfyniad Arddull Chicago

Tyson, Neil deGrasse, and Avis Lang. Space Chronicles: Facing the Ultimate Frontier. New York: W.W. Norton, 2012.

Dyfyniad MLA

Tyson, Neil deGrasse, and Avis Lang. Space Chronicles: Facing the Ultimate Frontier. W.W. Norton, 2012.

Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.