Kind of is singular, so the noun following it needs to be singular; kinds of is plural, so what follows needs to be plural. When either kind or kinds is preceded by a demonstrative pronoun, it should be this or that for kind of and these or those for kinds of (for example, these kinds of suits, this kind of suit). Don’t mix them by saying these kind of suits or these kinds of suit.
The same is true for type/types of and sort/sorts of. The singulars—type of and sort of–should be preceded by the singular demonstrative pronouns this and that and followed by a singular noun, as in this type of book and this sort of problem. The plurals—types of and sorts of—should be preceded by these and those and followed by a plural noun, as in these types of books and these sorts of problems.
In other words, everything should match.
Is there a difference between kind/kinds or sort/sorts?
Reply: Kind/kinds of and sort/sorts of are used interchangeably in everyday English to mean members in a particular variety. Regardless of which one you use, however, the same rules about agreement apply: These kinds of changes, this sort of change, etc. The same is also true for type/types of: These types of changes.