Παραπομπή APA

Halvorson, H. H. (2012). 9 things successful people do differently. Boston, Mass: Harvard Business Review Press.

Παραπομπή Chicago Style

Halvorson, Heidi Halvorson. 9 Things Successful People Do Differently. Boston, Mass: Harvard Business Review Press, 2012.

Παραπομπή MLA

Halvorson, Heidi Halvorson. 9 Things Successful People Do Differently. Boston, Mass: Harvard Business Review Press, 2012.

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