Cita APA (7a ed.)

Roberts, J. M., & Sutton-Smith, B. (1962). Child training and game involvement. [s.n.].

Cita Chicago Style (17a ed.)

Roberts, John M., y Brian Sutton-Smith. Child Training and Game Involvement. [S.l.]: [s.n.], 1962.

Cita MLA (9a ed.)

Roberts, John M., y Brian Sutton-Smith. Child Training and Game Involvement. [s.n.], 1962.