Dyfyniad APA

Jones, W. B., & Harper, R. M. (1935). History and work of geological surveys and industrial development in Alabama. Geological Survey of Alabama.

Dyfyniad Arddull Chicago

Jones, Walter B., and Roland M. Harper. History and Work of Geological Surveys and Industrial Development in Alabama. University, Ala.: Geological Survey of Alabama, 1935.

Dyfyniad MLA

Jones, Walter B., and Roland M. Harper. History and Work of Geological Surveys and Industrial Development in Alabama. Geological Survey of Alabama, 1935.

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