Gaya APA

Boen, T., Wangsadinata, W. (1971). A brief outline of seismicity and earthquake Engineering problems in Indonesia (1971). : Jakarta : DPU.,.

Gaya MLA

Boen, T., Wangsadinata, Wiratman. "A brief outline of seismicity and earthquake Engineering problems in Indonesia". 1971 : Jakarta : DPU.,, 1971. Text.