Challenging the system. Challenging the system. Emergency nurse : the journal of the RCN Accident and Emergency Nursing Association [No authors listed] PMID: 19367829 Emerg Nurse. 2009 Mar;16(10):6. No abstract available. Share Share on social media Direct link Direct link Cite Cite AMA Challenging the system. Emerg Nurse. 2009;16(10):6 APA (2009). Challenging the system. Emergency nurse : the journal of the RCN Accident and Emergency Nursing Association, 16(10), 6. MLA "Challenging the system." Emergency nurse : the journal of the RCN Accident and Emergency Nursing Association vol. 16,10 (2009): 6. NLM Challenging the system. Emerg Nurse. 2009 Mar;16(10):6. PMID: 19367829. Copy Download .nbib Format: NLM AMA APA MLA NLM