Keijser, J. M. (1982). Political world union, 1962-1981: A documentary appraisal. Foundation "Working Group World Union".
Citazione stile Chigago Style (17a edizione)Keijser, Johan M.L.F. Political World Union, 1962-1981: A Documentary Appraisal. The Hague: Foundation "Working Group World Union", 1982.
Citatione MLA (9a ed.)Keijser, Johan M.L.F. Political World Union, 1962-1981: A Documentary Appraisal. Foundation "Working Group World Union", 1982.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.