Snowball, G. J. (1972). Information/Library Statistics as a Management Aid: A Graphic Presentation.
Citazione stile Chigago Style (17a edizione)Snowball, George J. Information/Library Statistics as a Management Aid: A Graphic Presentation. 1972.
Citatione MLA (9a ed.)Snowball, George J. Information/Library Statistics as a Management Aid: A Graphic Presentation. 1972.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.