Dyfyniad APA

HAWKING, S. (1988). A BRIEF HISTORY OF TIME: FROM THE BIG BANG TO BLACK HOLES. BANTAM BOOKS.

Dyfyniad Arddull Chicago

HAWKING, STEPHEN. A BRIEF HISTORY OF TIME: FROM THE BIG BANG TO BLACK HOLES. LONDON: BANTAM BOOKS, 1988.

Dyfyniad MLA

HAWKING, STEPHEN. A BRIEF HISTORY OF TIME: FROM THE BIG BANG TO BLACK HOLES. BANTAM BOOKS, 1988.

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