Cita APA

Saborío Pérez, I., Villalobos Chacón, I., Chacón Araya, X., Seravalli Monge, G. 1., & Bolaños Villalobos, I. C. (2005). Conversational english.com @ language skill network: For computer science students. [San José, Costa Rica]: Universidad Nacional.

Citación estilo Chicago

Saborío Pérez, Ileana, Isaac Villalobos Chacón, Xinia Chacón Araya, Giannina 1973- Seravalli Monge, y Isabel Cristina Bolaños Villalobos. Conversational English.com @ Language Skill Network: For Computer Science Students. [San José, Costa Rica]: Universidad Nacional, 2005.

Cita MLA

Saborío Pérez, Ileana, et al. Conversational English.com @ Language Skill Network: For Computer Science Students. [San José, Costa Rica]: Universidad Nacional, 2005.