Dyfyniad APA

Hawking, S. W. (1988). A brief history of time. Bantam Press.

Dyfyniad Arddull Chicago

Hawking, Stephen W. A Brief History of Time. Britain: Bantam Press, 1988.

Dyfyniad MLA

Hawking, Stephen W. A Brief History of Time. Bantam Press, 1988.

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