Não informado. (2014). Quality and Quantity. Kluwer Academic Publishers.
Chicago-referens (17:e uppl.)Não informado. Quality and Quantity. Dordrecht, Holanda: Kluwer Academic Publishers, 2014.
MLA-referens (8:e uppl.)Não informado. Quality and Quantity. Kluwer Academic Publishers, 2014.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.