Cita APA (7th ed.)
Hancock, L. E., & Mitchell, C. R. (2007). Zones of peace. Kumarian Press.
Cita Chicago (17th ed.)
Hancock, Landon E., i C. R. Mitchell. Zones of Peace. Bloomfield, CT: Kumarian Press, 2007.
Cita MLA (9th ed.)
Hancock, Landon E., i C. R. Mitchell. Zones of Peace. Kumarian Press, 2007.
Atenció: Aquestes cites poden no estar 100% correctes.