Cita APA (7a ed.)

Markham, U. (1993). How to deal with difficult people. [s.n].

Cita Chicago Style (17a ed.)

Markham, Ursula. How to Deal with Difficult People. ThorSonS, London: [s.n], 1993.

Cita MLA (9a ed.)

Markham, Ursula. How to Deal with Difficult People. [s.n], 1993.