Não informado. (1956). Oklahoma Geology Notes. Oklahoma Geological Survey.
Style de citation Chicago (17e éd.)Não informado. Oklahoma Geology Notes. Norman, Okla: Oklahoma Geological Survey, 1956.
Style de citation MLA (8e éd.)Não informado. Oklahoma Geology Notes. Oklahoma Geological Survey, 1956.
Attention : ces citations peuvent ne pas être correctes à 100%.