APA (7th ed.) Citation

O' Sullivan, O' Sullivan, M., & Gamissans Serna, P. (2004). Postres. Editors.

Chicago Style (17th ed.) Citation

O' Sullivan, Margaret O' Sullivan, and Paula Gamissans Serna. Postres. Barcelona: Editors, 2004.

MLA (9th ed.) Citation

O' Sullivan, et al. Postres. Editors, 2004.