Cita APA (7a ed.)

Pellegrini, A. D. (1990). Elementary school children's playground behavior: Implications for children's social-cognitive development. [s.n.].

Cita Chicago Style (17a ed.)

Pellegrini, Anthony D. Elementary School Children's Playground Behavior: Implications for Children's Social-cognitive Development. [S.l.]: [s.n.], 1990.

Cita MLA (9a ed.)

Pellegrini, Anthony D. Elementary School Children's Playground Behavior: Implications for Children's Social-cognitive Development. [s.n.], 1990.