Cita APA (7a ed.)

Hanly B., B. e. a. A workbook of english composition and conversation. Universidad de Costa Rica.

Cita Chicago Style (17a ed.)

Hanly B., Brian et al. A Workbook of English Composition and Conversation. San José, Costa Rica: Universidad de Costa Rica.

Cita MLA (9a ed.)

Hanly B., Brian et al. A Workbook of English Composition and Conversation. Universidad de Costa Rica.