Hammond, R. J. (1962). Portugal's African problem: Some economic facets. A working paper prepared for the Carnegie Endowment for the International Peace. s.n.
Citazione stile Chigago Style (17a edizione)Hammond, Richard James. Portugal's African Problem: Some Economic Facets. A Working Paper Prepared for the Carnegie Endowment for the International Peace. New York: s.n, 1962.
Citatione MLA (9a ed.)Hammond, Richard James. Portugal's African Problem: Some Economic Facets. A Working Paper Prepared for the Carnegie Endowment for the International Peace. s.n, 1962.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.