Cita APA (7a ed.)

Pellegrini, A. D. (1985). Social-cognitive aspects of children's play: The effects of age, gender, and activity centers. [s.n.].

Cita Chicago Style (17a ed.)

Pellegrini, Anthony D. Social-cognitive Aspects of Children's Play: The Effects of Age, Gender, and Activity Centers. [S.l.]: [s.n.], 1985.

Cita MLA (9a ed.)

Pellegrini, Anthony D. Social-cognitive Aspects of Children's Play: The Effects of Age, Gender, and Activity Centers. [s.n.], 1985.