APA (7th ed.) Citation

United States. Department of State & ProQuest (Firm). (1835). Duties at Porto Rico. Letter from the Secretary of State to the chairman of the Committee on Commerce, in relation to an increase of duties at Porto Rico. [publisher not identified].

Chicago Style (17th ed.) Citation

United States. Department of State and ProQuest (Firm). Duties at Porto Rico. Letter from the Secretary of State to the Chairman of the Committee on Commerce, in Relation to an Increase of Duties at Porto Rico. Washington: [publisher not identified], 1835.

MLA (9th ed.) Citation

United States. Department of State and ProQuest (Firm). Duties at Porto Rico. Letter from the Secretary of State to the Chairman of the Committee on Commerce, in Relation to an Increase of Duties at Porto Rico. [publisher not identified], 1835.