Rens, J. (1961). The ILO and international technical co-operation. International Labour Organization.
Citazione stile Chigago Style (17a edizione)Rens, Jef. The ILO and International Technical Co-operation. International Labour Organization, 1961.
Citatione MLA (9a ed.)Rens, Jef. The ILO and International Technical Co-operation. International Labour Organization, 1961.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.