APA (7th ed.) Citation

(1920). U.S. foreign trade for 1919 and 1920 in finished coal-tar colors and indigo. GPO.

Chicago Style (17th ed.) Citation

U.S. Foreign Trade for 1919 and 1920 in Finished Coal-tar Colors and Indigo. [Washington]: GPO, 1920.

MLA (9th ed.) Citation

U.S. Foreign Trade for 1919 and 1920 in Finished Coal-tar Colors and Indigo. GPO, 1920.