Dyfyniad APA

Willis, B. (1930). Living Africa: A geologist's wanderings through the rift valleys. Whittlesey House, McGraw-Hill.

Dyfyniad Arddull Chicago

Willis, Bailey. Living Africa: A Geologist's Wanderings Through the Rift Valleys. [New York]: Whittlesey House, McGraw-Hill, 1930.

Dyfyniad MLA

Willis, Bailey. Living Africa: A Geologist's Wanderings Through the Rift Valleys. Whittlesey House, McGraw-Hill, 1930.

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