(1976). Policies Guiding Library Service and Selection of Library Materials.
Citazione stile Chigago Style (17a edizione)Policies Guiding Library Service and Selection of Library Materials. 1976.
Citatione MLA (9a ed.)Policies Guiding Library Service and Selection of Library Materials. 1976.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.