Dyfyniad APA

Engelbert, P. (1997). Astronomy and Space: From the Big Bang to the Big Crunch. U. X. L.

Dyfyniad Arddull Chicago

Engelbert, Phillis. Astronomy and Space: From the Big Bang to the Big Crunch. New York: U. X. L, 1997.

Dyfyniad MLA

Engelbert, Phillis. Astronomy and Space: From the Big Bang to the Big Crunch. U. X. L, 1997.

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