Não informado. (1969). Bibliography and Index of Geology. Geological Society of America.
Style de citation Chicago (17e éd.)Não informado. Bibliography and Index of Geology. Washington: Geological Society of America, 1969.
Style de citation MLA (8e éd.)Não informado. Bibliography and Index of Geology. Geological Society of America, 1969.
Attention : ces citations peuvent ne pas être correctes à 100%.