The new JRCALC UK ambulance services clinical practice guidelines 2016 were published in April 2016. Here is an example of how you should reference the new guidelines in your assignments:
In text (First cite):
…(Brown, Kumar, Millins, & Mark, 2016).
Brown, Kumar, Millins and Mark (2016) …
In text (Second and subsequent citations)
(Brown et al., 2016)
Brown et al. (2016)
In the reference list
Brown, S. N., Kumar, D., Millins, M., & Mark, J. (Eds.). (2016). UK ambulance services
clinical practice guidelines 2016. Bridgwater: Class Professional.