(1999). Brief advice to parents does not protect asthmatic children from passive smoking. British Medical Journal.
Chicago-tyylinen lähdeviittausBrief Advice to Parents Does Not Protect Asthmatic Children From Passive Smoking. British Medical Journal, 1999.
MLA-viiteBrief Advice to Parents Does Not Protect Asthmatic Children From Passive Smoking. British Medical Journal, 1999.
Varoitus: Nämä viitteet eivät aina ole täysin luotettavia.