Cita APA

Brown Gfrorer, B. (1992). Basic english for students of social sciences and humanities (2a. ed.). San José, C. R.: Universidad de Costa Rica.

Citación estilo Chicago

Brown Gfrorer, Bonnie. Basic English for Students of Social Sciences and Humanities. 2a. ed. San José, C. R.: Universidad de Costa Rica, 1992.

Cita MLA

Brown Gfrorer, Bonnie. Basic English for Students of Social Sciences and Humanities. 2a. ed. San José, C. R.: Universidad de Costa Rica, 1992.