Gray, H. (1981). Christmas Island - naturally: The natural history of an isolated oceanic island, the Australian territory of Christmas Island, Indian Ocean. H. Gray.
Chicago Style (17th ed.) CitationGray, Howard. Christmas Island - Naturally: The Natural History of an Isolated Oceanic Island, the Australian Territory of Christmas Island, Indian Ocean. Geraldton, W.A.: H. Gray, 1981.
MLA (8th ed.) CitationGray, Howard. Christmas Island - Naturally: The Natural History of an Isolated Oceanic Island, the Australian Territory of Christmas Island, Indian Ocean. H. Gray, 1981.
Warning: These citations may not always be 100% accurate.