TICHY NOEL M. (1997). LEADERSHIP ENGINE: HOW WINNING COMPANIES BUILD LEADERS AT EVERY LEVEL. HARPER COLLINS PUBLISHERS.
Chicago Style aipamenaTICHY NOEL M. LEADERSHIP ENGINE: HOW WINNING COMPANIES BUILD LEADERS AT EVERY LEVEL. NEW YORK: HARPER COLLINS PUBLISHERS, 1997.
MLA aipamenaTICHY NOEL M. LEADERSHIP ENGINE: HOW WINNING COMPANIES BUILD LEADERS AT EVERY LEVEL. HARPER COLLINS PUBLISHERS, 1997.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.