APA-referens (7:e uppl.)
Ringgold, C. (1852). Series of charts with sailing directions embracing surveys of the Farallones, entrance to the Bay of San Francisco: 4. ed.
Chicago-referens (17:e uppl.)
Ringgold, Cadwaladar. Series of Charts with Sailing Directions Embracing Surveys of the Farallones, Entrance to the Bay of San Francisco: 4. Ed. Washington, 1852.
MLA-referens (9:e uppl.)
Ringgold, Cadwaladar. Series of Charts with Sailing Directions Embracing Surveys of the Farallones, Entrance to the Bay of San Francisco: 4. Ed. 1852.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.