APA-čujuhus (7. p.)
Ward, B. (1962). The rich nations and the poor nations. W.W.Norton & Co..
Chicago-čujuhus (17. p.)
Ward, Barbara. The Rich Nations and the Poor Nations. New York: W.W.Norton & Co., 1962.
MLA-čujuhus (9. p.)
Ward, Barbara. The Rich Nations and the Poor Nations. W.W.Norton & Co., 1962.
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