How to find a tour guide in Cuba?

If you come to Havana, I'm sure you'll need the help of a guide to visit the city. I give you this information that could be useful.

Tours in Old Havana, the modern part of the city, Viñales (in Pinar del Río) and the Zapata  Swamp (in Matanzas) Guide service in English and Spanish, 10 CUC each hour. If you want more than one day of tour it is 8 cuc each hour.