Raymond Briggs. (2013). The snowman. Puffin.
Cita Chicago (17th ed.)Raymond Briggs. The Snowman. London: Puffin, 2013.
Cita MLA (8th ed.)Raymond Briggs. The Snowman. Puffin, 2013.
Atenció: Aquestes cites poden no estar 100% correctes.
Cita APA (7th ed.)