Cita APA (7a ed.)

Powell, C. (1999). What is mediation? [s.n.].

Cita Chicago Style (17a ed.)

Powell, Carol. What Is Mediation? [S.l.]: [s.n.], 1999.

Cita MLA (9a ed.)

Powell, Carol. What Is Mediation? [s.n.], 1999.