Keesecker, W. W., & Lathrop, E. A. (1941). Laws affecting school libraries. U. S. Govt. Print. Off.
Cita Chicago (17th ed.)Keesecker, Ward W., i Edith Anna Lathrop. Laws Affecting School Libraries. Washington: U. S. Govt. Print. Off, 1941.
Cita MLA (9th ed.)Keesecker, Ward W., i Edith Anna Lathrop. Laws Affecting School Libraries. U. S. Govt. Print. Off, 1941.
Atenció: Aquestes cites poden no estar 100% correctes.