Cita APA (7th ed.)
Waitley, D. Dynamic self discipline. Nightingale Conant corporation.
Cita Chicago (17th ed.)
Waitley, Denis. Dynamic Self Discipline. Illinois, USA: Nightingale Conant corporation.
Cita MLA (9th ed.)
Waitley, Denis. Dynamic Self Discipline. Nightingale Conant corporation.
Atenció: Aquestes cites poden no estar 100% correctes.