Cruz, E. F., & Chopra, A. K. Improved code-type earthquake analysis procedure for buildings. Journal of Structural Engineering.
Citazione stile Chigago Style (17a edizione)Cruz, Ernesto F., e Anil K. Chopra. "Improved Code-type Earthquake Analysis Procedure for Buildings." Journal of Structural Engineering .
Citatione MLA (9a ed.)Cruz, Ernesto F., e Anil K. Chopra. "Improved Code-type Earthquake Analysis Procedure for Buildings." Journal of Structural Engineering, .
Attenzione: Queste citazioni potrebbero non essere precise al 100%.