The Dutchman spent just one season under Ferguson, but was vital in securing the Scot's last Premier League title.
"Ferguson really was a super manager," Van Persie wrote in the book 'LVG – The Manager and the Total Person'.
"It was so brilliant how he always kept the entire squad happy and focussed.
"Wenger was a combination of Ferguson and Van Gaal. Arsene always emphasised all the positive things and he looked at what would work for the long term.
"Tactically he [Van Gaal] is a genius. You can't deny that.
"I have had managers who had their own strengths. But Ferguson really was a super manager."