APA način citiranja

Ramírez, M. d. R., Hernández Fajardo, A., & Morales, C. (1977). Philosophy in the preparatory certificate of social Sciences of the Universidad Nacional of Costa Rica.

Čikaški stil citiranja

Ramírez, María del Rosario, Axel Hernández Fajardo, i Carlos Morales. Philosophy in the Preparatory Certificate of Social Sciences of the Universidad Nacional of Costa Rica. 1977.

MLA način citiranja

Ramírez, María del Rosario, Axel Hernández Fajardo, i Carlos Morales. Philosophy in the Preparatory Certificate of Social Sciences of the Universidad Nacional of Costa Rica. 1977.