Lefton, R. (2004). Leadership through people skills. TMH.
Citazione stile Chigago Style (17a edizione)Lefton, Robert. Leadership Through People Skills. New Delhi: TMH, 2004.
Citatione MLA (9a ed.)Lefton, Robert. Leadership Through People Skills. TMH, 2004.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.