Lavers, G. M. (1969). The strength properties of timbers (2nd ed.). Her Majesty's Stationery Office.
Lua i Stíl Chicago (17ú heag.)Lavers, Gwendoline M. The Strength Properties of Timbers. 2nd ed. London: Her Majesty's Stationery Office, 1969.
Lua MLA (9ú heag.)Lavers, Gwendoline M. The Strength Properties of Timbers. 2nd ed. Her Majesty's Stationery Office, 1969.
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