COYLE DAVID CUSHOUAN. (1960). UNITED NATIONS AND HOW IT WORKS. MENTOR BOOKS.
Lua i Stíl Chicago (17ú heag.)COYLE DAVID CUSHOUAN. UNITED NATIONS AND HOW IT WORKS. NEW YORK: MENTOR BOOKS, 1960.
Lua MLA (9ú heag.)COYLE DAVID CUSHOUAN. UNITED NATIONS AND HOW IT WORKS. MENTOR BOOKS, 1960.
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