Cita APA (7th ed.)
Hart, H. H., & Guzmán Anell, J. T. (1972). Summerhill: For against.
Cita Chicago (17th ed.)
Hart, Harold H., i José Teódulo Guzmán Anell. Summerhill: For Against. 1972.
Cita MLA (9th ed.)
Hart, Harold H., i José Teódulo Guzmán Anell. Summerhill: For Against. 1972.
Atenció: Aquestes cites poden no estar 100% correctes.