Gaya APA

Gray, W. (1973). Concrete water towers bunkers silos and other elevated structures (5th Ed.). Grosvenor Gardens, London: Cement and Concrete Association.

Gaya MLA

Gray, W.S.. "Concrete water towers bunkers silos and other elevated structures". 5th Ed. Grosvenor Gardens, London: Cement and Concrete Association, 1973. Text.