Παραπομπή APA

Covey, S. R., & Sadasivan,M.P. (2012). Seven habits of highly effective people. D C Books.

Παραπομπή Chicago Style

Covey, Stephen R., και Sadasivan,M.P. Seven Habits of Highly Effective People. Kottayam: D C Books, 2012.

Παραπομπή MLA

Covey, Stephen R., και Sadasivan,M.P. Seven Habits of Highly Effective People. D C Books, 2012.