APA Style

WILSON, E, L., HABIBULLAH, A. (1989). SAPCON : a concrete design postprocessor for SAP90, SAPSTL : a steel stress check postprocessor for SAP90 . California: Computers & Structures.

MLA Style

WILSON, EDWARD, L.., HABIBULLAH, ASHRAF. "SAPCON : a concrete design postprocessor for SAP90, SAPSTL : a steel stress check postprocessor for SAP90". California: Computers & Structures, 1989. Text.