Lua APA (7ú heag.)

JOHANSEN, K. (1972). Yield-line Formulae For Slabs / Johansen KW. Cement and Concrete Associatio.

Lua i Stíl Chicago (17ú heag.)

JOHANSEN, K.W. Yield-line Formulae For Slabs / Johansen KW. Cement and Concrete Associatio, 1972.

Lua MLA (8ú heag.)

JOHANSEN, K.W. Yield-line Formulae For Slabs / Johansen KW. Cement and Concrete Associatio, 1972.

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