(1928). The progress of organisation among intellectual workers. International Labour Organization.
Citazione stile Chigago Style (17a edizione)The Progress of Organisation Among Intellectual Workers. International Labour Organization, 1928.
Citatione MLA (9a ed.)The Progress of Organisation Among Intellectual Workers. International Labour Organization, 1928.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.