Joseph Rémi Léopold Delbœuf
Here's your citation in American Psychological Association (APA) format:
Joseph Rémi Léopold Delbœuf. (n.d.). In Alleydog.com's online glossary. Retrieved from: https://www.alleydog.com/glossary/definition-cit.php?term=Joseph+R%26eacute%3Bmi+L%26eacute%3Bopold+Delb%26oelig%3Buf