Schroeder, A. (2009). The Snowball. Bloomsbury.
Cita Chicago (17th ed.)Schroeder, Alice. The Snowball. New Delhi: Bloomsbury, 2009.
Cita MLA (9th ed.)Schroeder, Alice. The Snowball. Bloomsbury, 2009.
Atenció: Aquestes cites poden no estar 100% correctes.