MCCLAREN, A. W. e. a. (1987). Laidlaw english. Laidlaw Brothers.
Lua i Stíl Chicago (17ú heag.)MCCLAREN, Adrian W. et all. Laidlaw English. Illinois: Laidlaw Brothers, 1987.
Lua MLA (9ú heag.)MCCLAREN, Adrian W. et all. Laidlaw English. Laidlaw Brothers, 1987.
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