Cita APA

Duval, P., Dawson, R., & Wilson, K. I. (1998). Counting 1 to 20: English, Romani, German, French. The Bogey Hole.

Citación estilo Chicago

Duval, Pauline, Robert Dawson, y Ken Illustrator Wilson. Counting 1 to 20: English, Romani, German, French. Alfreton, Derbyshire: The Bogey Hole, 1998.

Cita MLA

Duval, Pauline, et al. Counting 1 to 20: English, Romani, German, French. The Bogey Hole, 1998.