Lua APA (7ú heag.)

ZIKMUND I , B. C. (2013). BUSINESS RESEARCH METHODS (9TH.). CENGAGE.

Lua i Stíl Chicago (17ú heag.)

ZIKMUND I , BABIN CARR. BUSINESS RESEARCH METHODS. 9TH. NEW DELHI: CENGAGE, 2013.

Lua MLA (9ú heag.)

ZIKMUND I , BABIN CARR. BUSINESS RESEARCH METHODS. 9TH. CENGAGE, 2013.

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