APA (7th ed.) Citation

Hall, M., Duval, M., & Sierra Bárbara. (2010). Metacoaching. Editorial Trillas.

Chicago Style (17th ed.) Citation

Hall, Michael, Michelle Duval, and Sierra Bárbara. Metacoaching. México: Editorial Trillas, 2010.

MLA (9th ed.) Citation

Hall, Michael, et al. Metacoaching. Editorial Trillas, 2010.