Lua APA (7ú heag.)

BURNS ROBERT B. (2000). INTRODUCTION TO RESEARCH METHODS (4TH.). LONGMAN GROUP.

Lua i Stíl Chicago (17ú heag.)

BURNS ROBERT B. INTRODUCTION TO RESEARCH METHODS. 4TH. AUSTRALIA: LONGMAN GROUP, 2000.

Lua MLA (9ú heag.)

BURNS ROBERT B. INTRODUCTION TO RESEARCH METHODS. 4TH. LONGMAN GROUP, 2000.

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