ebrary, Inc, & Ludvigsen, R. (1996). Life in stone: A natural history of British Columbia's fossils. UBC Press.
Chicagoスタイル(17版)引用形式ebrary, Inc, , Rolf Ludvigsen. Life in Stone: A Natural History of British Columbia's Fossils. Vancouver, BC: UBC Press, 1996.
MLA(9版)引用形式ebrary, Inc, , Rolf Ludvigsen. Life in Stone: A Natural History of British Columbia's Fossils. UBC Press, 1996.
警告: この引用は必ずしも正確ではありません.