Cita APA (7a ed.)

Twemlow, S. W., & Sacco, F. C. (2012). Preventing bullying and school violence (1. ed., 2. [print.].). American Psychiatric Publ.

Cita Chicago Style (17a ed.)

Twemlow, Stuart W., y Frank C. Sacco. Preventing Bullying and School Violence. 1. ed., 2. [print.]. Washington, DC [u.a.]: American Psychiatric Publ, 2012.

Cita MLA (9a ed.)

Twemlow, Stuart W., y Frank C. Sacco. Preventing Bullying and School Violence. 1. ed., 2. [print.]. American Psychiatric Publ, 2012.