Map of Gaspar de Portola's route from San Diego to San Luis Obispo in 1769, projected on a modern map, [s.d.]

Chicago citation style
Map of Gaspar de Portola's route from San Diego to San Luis Obispo in 1769, projected on a modern map, [s.d.]. Retrieved from the Digital Public Library of America, http://digitallibrary.usc.edu/cdm/ref/collection/p15799coll65/id/12746. (Accessed May 20, 2018.)
APA citation style
Map of Gaspar de Portola's route from San Diego to San Luis Obispo in 1769, projected on a modern map, [s.d.]. Retrieved from the Digital Public Library of America, http://digitallibrary.usc.edu/cdm/ref/collection/p15799coll65/id/12746
MLA citation style
Retrieved from the Digital Public Library of America <http://digitallibrary.usc.edu/cdm/ref/collection/p15799coll65/id/12746>.
Note: These citations are programmatically generated and may be incomplete.