Waard, D. d. (1996). The measurement of drivers' mental workload. Groningen University, Traffic Research Center.
Chicago-viite (17. p.)Waard, Dick de. The Measurement of Drivers' Mental Workload. Haren, The Netherlands: Groningen University, Traffic Research Center, 1996.
MLA-viite (8. p.)Waard, Dick de. The Measurement of Drivers' Mental Workload. Groningen University, Traffic Research Center, 1996.
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