The earliest reference to that quote I can find on the internet comes from "Macedonian Review: Volume 16-17" published in 1986 by "Kulturen Zhivot". The quote is on page 252 in that book, and offers a citation (citation 56) but I don't have access to the citations page.
https://books.google.com/books?id=ey...ylDw8Q6AEIKDAB