Cita APA (7a ed.)

Frost, J. L., & Jacobs, P. J. (1995). Play deprivation: A factor in juvenile violence. [s.n.].

Cita Chicago Style (17a ed.)

Frost, Joe L., y Paul J. Jacobs. Play Deprivation: A Factor in Juvenile Violence. [S.l.]: [s.n.], 1995.

Cita MLA (9a ed.)

Frost, Joe L., y Paul J. Jacobs. Play Deprivation: A Factor in Juvenile Violence. [s.n.], 1995.