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.
Chicago-viite (17. p.)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.
MLA-viite (9. p.)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.
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