Dyfyniad APA

ebrary, Inc, & Ludvigsen, R. (1996). Life in stone: A natural history of British Columbia's fossils. UBC Press.

Dyfyniad Arddull Chicago

ebrary, Inc, and Rolf Ludvigsen. Life in Stone: A Natural History of British Columbia's Fossils. Vancouver, BC: UBC Press, 1996.

Dyfyniad MLA

ebrary, Inc, and Rolf Ludvigsen. Life in Stone: A Natural History of British Columbia's Fossils. UBC Press, 1996.

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