Cita APA (7a ed.)

Nwokah, E. E. (2010). Play as engagement and communication. University Press of America.

Cita Chicago Style (17a ed.)

Nwokah, Eva E. Play as Engagement and Communication. Lanham: University Press of America, 2010.

Cita MLA (8a ed.)

Nwokah, Eva E. Play as Engagement and Communication. University Press of America, 2010.