APA (7th ed.) Citation

Cambridge University Library, Adam Matthew Digital (Firm), & Siemer, H. Camp echo. Douglas Aliens' Camp.

Chicago Style (17th ed.) Citation

Cambridge University Library, Adam Matthew Digital (Firm), and H. Siemer. Camp Echo. Douglas: Douglas Aliens' Camp.

MLA (9th ed.) Citation

Cambridge University Library, et al. Camp Echo. Douglas Aliens' Camp.