APA (7th ed.) Citation

Boom, C. t., Sherrill, J. L., & Sherrill, E. (2015). El refugio secreto. Palabra.

Chicago Style (17th ed.) Citation

Boom, Corrie ten, John L. Sherrill, and Elizabeth Sherrill. El Refugio Secreto. Madrid: Palabra, 2015.

MLA (9th ed.) Citation

Boom, Corrie ten, et al. El Refugio Secreto. Palabra, 2015.