15th=Fifteenth> Allerton Park Intitute (1968 : Illinois). (1969). Cooperation between types of libraries: The beginnings of a state plan for library services in Illinois. University of Illinois, Graduate School of Library Science.
Cita Chicago (17th ed.)15th=Fifteenth> Allerton Park Intitute (1968 : Illinois). Cooperation Between Types of Libraries: The Beginnings of a State Plan for Library Services in Illinois. Urbana: University of Illinois, Graduate School of Library Science, 1969.
Cita MLA (9th ed.)15th=Fifteenth> Allerton Park Intitute (1968 : Illinois). Cooperation Between Types of Libraries: The Beginnings of a State Plan for Library Services in Illinois. University of Illinois, Graduate School of Library Science, 1969.
Atenció: Aquestes cites poden no estar 100% correctes.