Guizzo, E. Tech in sight three ways to move people- fast, faster, fastest. IEEE spectrum.
Chicago-viite (17. p.)Guizzo, E. "Tech in Sight Three Ways to Move People- Fast, Faster, Fastest." IEEE Spectrum .
MLA-viite (9. p.)Guizzo, E. "Tech in Sight Three Ways to Move People- Fast, Faster, Fastest." IEEE Spectrum, .
Varoitus: Nämä viitteet eivät aina ole täysin luotettavia.