APA (7th ed.) Citation

Speer, J. S., & Bowen, T. (1770). Plan of the harbour of Omoa: Plan of the fortification now erecting at Omoa. [publisher not identified].

Chicago Style (17th ed.) Citation

Speer, Joseph Smith, and Thomas Bowen. Plan of the Harbour of Omoa: Plan of the Fortification Now Erecting at Omoa. [England?]: [publisher not identified], 1770.

MLA (9th ed.) Citation

Speer, Joseph Smith, and Thomas Bowen. Plan of the Harbour of Omoa: Plan of the Fortification Now Erecting at Omoa. [publisher not identified], 1770.