Não informado. (1971). Historical Abstracts. American Bibliographical Center.
Style de citation Chicago (17e éd.)Não informado. Historical Abstracts. Santa Barbara, Calif: American Bibliographical Center, 1971.
Style de citation MLA (8e éd.)Não informado. Historical Abstracts. American Bibliographical Center, 1971.
Attention : ces citations peuvent ne pas être correctes à 100%.