Below is a suggestion for how to cite The Royal Children's Hospital (RCH) Nursing Guidelines. It meets the APA style requirements, but you may want to check the requirements of the journal etc you are submitting to. 

The Royal Children's Hospital, Melbourne, Australia, Nursing Guideline on topic name, [Internet, last updated see date at the bottom of the particular guideline (where available); cited date you last viewed], Available from: [INSERT GUIDELINE LINK] 

Website use 

In general, we prefer you to link to our site rather than republish our materials. Your users will then always have access to the most up-to-date version of our guidelines 

You do not need our permission to link to our site, but you will need permission to republish any of our materials. 

More details are available regarding the RCH website Terms of Use. 

Use for resources other than websites 

If you want to make limited use of our materials in not-for-profit internal or educational activities and publications, then in general we are happy to grant this. 

We also usually grant permission for small amounts of material to be republished in textbooks etc. 

In general, we do not grant permission for larger amounts of our material to be republished, rebranded, or used for other commercial purposes including textbooks 

In each of these situations you must ask us before using our materials and must indicate exactly what materials you want to use and for what purpose. Nursing guidelines: Contact us

If we do grant you permission then you must acknowledge us as the source, and if the information is modified for publication this must be indicated in your version.

For example

"Republished, with permission, from resources at The Royal Children's Hospital, Melbourne, Australia www.rch.org.au/clinicalguide " 

"Adapted, with permission, from resources at The Royal Children's Hospital, Melbourne, Australia www.rch.org.au/clinicalguide "

Please remember to read the disclaimer.