Bibiliography

"SportsKnowHow.com - Volleyball" Volleyball Court Dimension Diagrams, History, Rules - SportsKnowHow.com | Court & Field Dimension Diagrams in 3D, History, Rules – SportsKnowHow.com. Internet Marketing Unlimited, Corp, n.d.24 Apr, 2019
https://sportsknowhow.com/volleyball/index.html