Social & Membership Services Industry Yearbook. IHS Markit Ltd.
Citazione stile Chigago Style (17a edizione)Social & Membership Services Industry Yearbook. IHS Markit Ltd.
Citatione MLA (9a ed.)Social & Membership Services Industry Yearbook. IHS Markit Ltd.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.