Where could one find an authentic ragu sauce recipe?

There are many sources for authentic ragu sauce recipes. Here are a few suggestions:

* Italian cookbooks: Many Italian cookbooks will include recipes for ragu sauce. Some popular cookbooks that feature ragu recipes include Marcella Hazan's "Essentials of Classic Italian Cooking" and Giuliano Hazan's "How to Cook Italian."

* Online cooking websites: There are many websites that offer recipes for ragu sauce. Some popular websites that feature ragu recipes include The Food Network, Allrecipes, and Epicurious.

* Cooking magazines: Cooking magazines often feature recipes for ragu sauce. Some popular magazines that have featured ragu recipes include Bon Appetit, Food & Wine, and Saveur.

* Cooking classes: Cooking classes are a great way to learn how to make authentic ragu sauce. Many cooking schools offer classes that focus on Italian cuisine, and ragu sauce is often one of the dishes that is taught.

* Italian restaurants: Italian restaurants are a great place to try authentic ragu sauce. Many Italian restaurants offer ragu sauce as a main course or as a sauce for pasta.