Sister Chapters
Α - Alpha Chapter: University of Southern California : 1949
Β - Beta Chapter: California State University, Long Beach : 1970
Γ - Gamma Chapter : University of Texas : May 1, 1991
Δ - Delta Chapter : Delta Chapter : San Diego State University : December 18, 1991
Ε - Epsilon Chapter : University of Houston : April 21, 1995
Ζ - Zeta Chapter : University of California at Berkeley : April 5, 1997
Η - Eta Chapter : Baylor University : May 1, 1999
Θ - Theta Chapter : Southern Methodist University : 2006