Cita APA (7a ed.)

Popenoe, J. (1975). Summerhill (2“ ed.). Laia.

Cita Chicago Style (17a ed.)

Popenoe, Joshua. Summerhill. 2“ ed. Barcelona: Laia, 1975.

Cita MLA (9a ed.)

Popenoe, Joshua. Summerhill. 2“ ed. Laia, 1975.