Cita APA (7th ed.)

St. John Ambulance. (1987). Emergency first aid. St.John Ambulance.

Cita Chicago (17th ed.)

St. John Ambulance. Emergency First Aid. Ottawa: St.John Ambulance, 1987.

Cita MLA (9th ed.)

St. John Ambulance. Emergency First Aid. St.John Ambulance, 1987.