Content in the BOMA content library can be shared via social media, email and as a blog on your website. If an article does not show "Website" in it's delivery list you can't send it to your Website or Blog:
If an article is shareable to your Website you will see the "Send to Zapier" button, and there will be copy buttons for the content. In this case the content can be reused on your website or elsewhere, and can be reformatted to your purposes. There is no need to attribute the content in any of these cases.
Further Reading:
Accessing Xero guides and content in BOMA
How to enter a library access code to unlock a premium library in BOMA
How do I select content from the content library for my campaign?
Is the content in the content library specific to my country and/or region?
Using BOMA content on your website or blog