O'Donnell, T., & Vaughan, T. (1976). Portland: A historical sketch and guide. Oregon Historical Society.
Cita Chicago Style (17a ed.)O'Donnell, Terence, y Thomas Vaughan. Portland: A Historical Sketch and Guide. [Portland]: Oregon Historical Society, 1976.
Cita MLA (8a ed.)O'Donnell, Terence, y Thomas Vaughan. Portland: A Historical Sketch and Guide. Oregon Historical Society, 1976.
Precaución: Estas citas no son 100% exactas.