APA Citation

Blake, B., & Becher, A. (1987). The new key to Costa Rica (7. edición --.). San José, Costa Rica: Publications in English.

Chicago Style Citation

Blake, Beatrice, and Anne Becher. The New Key to Costa Rica. 7. edición --. San José, Costa Rica: Publications in English, 1987.

MLA Citation

Blake, Beatrice, and Anne Becher. The New Key to Costa Rica. 7. edición --. San José, Costa Rica: Publications in English, 1987.

Warning: These citations may not always be 100% accurate.