World Conference on Prestressed Concrete, San Francisco. 1957. (1957). Proceedings. Conference presented by University of California in cooperation with Prestressed Concrete Institute [and others]: J. W. Kelly [and others]. s.n.
Citace podle Chicago (17th ed.)World Conference on Prestressed Concrete, San Francisco. 1957. Proceedings. Conference Presented by University of California in Cooperation with Prestressed Concrete Institute [and Others]: J. W. Kelly [and Others]. San Francisco: s.n, 1957.
Citace podle MLA (9th ed.)World Conference on Prestressed Concrete, San Francisco. 1957. Proceedings. Conference Presented by University of California in Cooperation with Prestressed Concrete Institute [and Others]: J. W. Kelly [and Others]. s.n, 1957.
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