APA (7th ed.) Citation

(1920). U.S.A., 6 per cent Treasury certificates of indebtedness, Series C-1921. [publisher not identified].

Chicago Style (17th ed.) Citation

U.S.A., 6 Per Cent Treasury Certificates of Indebtedness, Series C-1921. Washington, D.C.: [publisher not identified], 1920.

MLA (9th ed.) Citation

U.S.A., 6 Per Cent Treasury Certificates of Indebtedness, Series C-1921. [publisher not identified], 1920.