APA (7th ed.) Citation

Aker, R., & Von der Porten, E. P. (2000). Discovering Francis Drake's California harbor. Drake Navigators Guild.

Chicago Style (17th ed.) Citation

Aker, Raymond, and Edward P. Von der Porten. Discovering Francis Drake's California Harbor. Palo Alto, CA (2605 Waverley St., Palo Alto 94306): Drake Navigators Guild, 2000.

MLA (9th ed.) Citation

Aker, Raymond, and Edward P. Von der Porten. Discovering Francis Drake's California Harbor. Drake Navigators Guild, 2000.