Johnson, D. (2012). Jobsite first aid: A field guide for the construction industry. Delmar Cengage Learning.
Chicago-referens (17:e uppl.)Johnson, Dan. Jobsite First Aid: A Field Guide for the Construction Industry. Clifton Park, N.Y.: Delmar Cengage Learning, 2012.
MLA-referens (9:e uppl.)Johnson, Dan. Jobsite First Aid: A Field Guide for the Construction Industry. Delmar Cengage Learning, 2012.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.