Eggert, M. (1999). Perfect counselling. Random House Bus Books.
Cita Chicago (17th ed.)Eggert, Max. Perfect Counselling. London: Random House Bus Books, 1999.
Cita MLA (9th ed.)Eggert, Max. Perfect Counselling. Random House Bus Books, 1999.
Atenció: Aquestes cites poden no estar 100% correctes.