McCollough, E. F., Van Buren, M., & Stearns, L. E. (1931). Essentials in library administration (4th ed. rev.). American Library Administration.
Lua i Stíl Chicago (17ú heag.)McCollough, Ethel Farquhar, Maud Van Buren, agus Lutie Eugenia Stearns. Essentials in Library Administration. 4th ed. rev. Chicago: American Library Administration, 1931.
Lua MLA (8ú heag.)McCollough, Ethel Farquhar, et al. Essentials in Library Administration. 4th ed. rev. American Library Administration, 1931.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.