APA (7th ed.) Citation

Army Service Schools (U.S.). (1921). Notation in Army register of graduation from general and special service schools. [publisher not identified].

Chicago Style (17th ed.) Citation

Army Service Schools (U.S.). Notation in Army Register of Graduation from General and Special Service Schools. Washington: [publisher not identified], 1921.

MLA (9th ed.) Citation

Army Service Schools (U.S.). Notation in Army Register of Graduation from General and Special Service Schools. [publisher not identified], 1921.