Gershevsky, R. H. (1959). PNLA 1909-1959: A chronological summary of fifty eventful years. Pacific Northwest Library Association.
Cita Chicago Style (17a ed.)Gershevsky, Ruth Hale. PNLA 1909-1959: A Chronological Summary of Fifty Eventful Years. [Seattle?]: Pacific Northwest Library Association, 1959.
Cita MLA (8a ed.)Gershevsky, Ruth Hale. PNLA 1909-1959: A Chronological Summary of Fifty Eventful Years. Pacific Northwest Library Association, 1959.
Precaución: Estas citas no son 100% exactas.