Lutzer, E. W. (1979). How to say no to stubborn habit. Victor Books.
Cita Chicago Style (17a ed.)Lutzer, Erwin W. How to Say No to Stubborn Habit. Victor Books, 1979.
Cita MLA (9a ed.)Lutzer, Erwin W. How to Say No to Stubborn Habit. Victor Books, 1979.
Precaución: Estas citas no son 100% exactas.