Cita APA (7a ed.)

Zubiri, C., & Johnson, S. R. (2002). Crawling kindergarten: Workbook for five year olds.

Cita Chicago Style (17a ed.)

Zubiri, Celia, y Sally Ruiz Johnson. Crawling Kindergarten: Workbook for Five Year Olds. Buenos Aires, 2002.

Cita MLA (9a ed.)

Zubiri, Celia, y Sally Ruiz Johnson. Crawling Kindergarten: Workbook for Five Year Olds. 2002.