Cita APA (7th ed.)

Moss, M., & Chapman, L. (2001). Smudge's grumpy day. Gullane Children's Books.

Cita Chicago (17th ed.)

Moss, Miriam, i Lynne Chapman. Smudge's Grumpy Day. London: Gullane Children's Books, 2001.

Cita MLA (9th ed.)

Moss, Miriam, i Lynne Chapman. Smudge's Grumpy Day. Gullane Children's Books, 2001.