On this wikipedia page there is the following recurrence relation for the complete Bell polynomials $B_n$: $$B_{n+1}(x_1,...,x_{n+1})=\sum_{i=0}^n\binom{n}{i}B_{n-i}(x_1,...,x_{n-i})x_{i+1}$$ with $B_0=1$.
I am trying to find a reference in form of a paper or book to cite this relation, but I was not able to find one. All the references on the wikipedia page (as far as I can see) do not include it.
Any help is very much appreciated, thanks in advance!