GLADWELL, M. (2001). THE TIPPING POINT: HOW LITTLE THINGS CAN MAKE A BIG DIFFERENCE. ABACUS, LONDON.
Lua i Stíl Chicago (17ú heag.)GLADWELL, MALCOLM. THE TIPPING POINT: HOW LITTLE THINGS CAN MAKE A BIG DIFFERENCE. ABACUS, LONDON, 2001.
Lua MLA (9ú heag.)GLADWELL, MALCOLM. THE TIPPING POINT: HOW LITTLE THINGS CAN MAKE A BIG DIFFERENCE. ABACUS, LONDON, 2001.
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