Gottfried+Wilhelm+Von+Leibniz
Here's your citation in American Psychological Association (APA) format:
Gottfried+Wilhelm+Von+Leibniz. (n.d.). In Alleydog.com's online glossary. Retrieved from: https://www.alleydog.com/glossary/definition-cit.php?term=Gottfried%2BWilhelm%2BVon%2BLeibniz