ADAMS GERALD R. (1985). UNDERSTANDING RESEARCH METHODS. LONGMAN GROUP.
Chicago-čujuhus (17. p.)ADAMS GERALD R. UNDERSTANDING RESEARCH METHODS. NEW YORK LONDON: LONGMAN GROUP, 1985.
MLA-čujuhus (9. p.)ADAMS GERALD R. UNDERSTANDING RESEARCH METHODS. LONGMAN GROUP, 1985.
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