Dyfyniad APA

Hoyle, F. (1975). Astronomy and cosmology: A modern course. San Francisco : W H Freeman.

Dyfyniad Arddull Chicago

Hoyle, Fred. Astronomy and Cosmology: A Modern Course. San Francisco : W H Freeman, 1975.

Dyfyniad MLA

Hoyle, Fred. Astronomy and Cosmology: A Modern Course. San Francisco : W H Freeman, 1975.

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