APA-ийн эшлэл(7 дахь хэвлэлт)

SEKARAN UMA. (2008). RESEARCH METHODS FOR BUSINESS A SKILL BUILDING APPROACH (4TH.). JOHN WILEY AND SONS LTD.

Чикаго-гийн эшлэл (17 дахь хэвлэлт)

SEKARAN UMA. RESEARCH METHODS FOR BUSINESS A SKILL BUILDING APPROACH. 4TH. NEW DELHI: JOHN WILEY AND SONS LTD, 2008.

MLA -ийн эшлэл (9 дэх хэвлэлт)

SEKARAN UMA. RESEARCH METHODS FOR BUSINESS A SKILL BUILDING APPROACH. 4TH. JOHN WILEY AND SONS LTD, 2008.