Quote Originally Posted by Doomer View Post
IDK if you know how to do the declension but this is how we learn it in Russian schools
Questions technique does not work for foreigners. Even for native speakers it helps only to identify the case, when the correct declension form is already known intuitively. Correct sequence is:
Винить красный лист - Винить кого/что? - Accusative case.

heartfelty, "в различных источниках" - plural prepositional because of preposition "в" in the sense of "in".