Obst, P. (2011). Age and gender comparisons of driving while sleepy: Behaviours and risk perceptions. Elsevier Ltd.
Chicago-referens (17:e uppl.)Obst, Patricia. Age and Gender Comparisons of Driving While Sleepy: Behaviours and Risk Perceptions. Netherlands: Elsevier Ltd, 2011.
MLA-referens (8:e uppl.)Obst, Patricia. Age and Gender Comparisons of Driving While Sleepy: Behaviours and Risk Perceptions. Elsevier Ltd, 2011.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.