U.S. Department or Labor Guide to First Aid. (1985). First and book. Gramercy.
Chicago-viite (17. p.)U.S. Department or Labor Guide to First Aid. First and Book. Gramercy, 1985.
MLA-viite (9. p.)U.S. Department or Labor Guide to First Aid. First and Book. Gramercy, 1985.
Varoitus: Nämä viitteet eivät aina ole täysin luotettavia.