Ulloa, A., Aguilar, T., Goicoechea, C., & Ramírez, R. (2011). DESCRIPTION, CLASSIFICATION AND GEOLOGICAL ASPECTS OF THE KARSTIC REGIONS OF COSTA RICA.
استشهاد بنمط شيكاغوUlloa, Andrés, Teresita Aguilar, Carlos Goicoechea, و Ronald Ramírez. DESCRIPTION, CLASSIFICATION AND GEOLOGICAL ASPECTS OF THE KARSTIC REGIONS OF COSTA RICA. 2011.
MLA استشهادUlloa, Andrés, Teresita Aguilar, Carlos Goicoechea, و Ronald Ramírez. DESCRIPTION, CLASSIFICATION AND GEOLOGICAL ASPECTS OF THE KARSTIC REGIONS OF COSTA RICA. 2011.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.