In cases where sources are authored by an organisation, write the name of the organisation in full:
NSW Education Standards Authority (2019) highlights that
If the organisation has an acronym and you will be referencing them multiple times throughout the assessment, you can introduce the acronym in brackets on the first occasion, then use it in subsequent references:
1st reference: NSW Education Standards Authority (NESA, 2019) highlights that …
… to review the curriculum (NSW Education Standards Authority [NESA], 2019).
Use square brackets [ ] around the acronym when the organisation name already appears in brackets.
Subsequent references: Additionally, NESA (2019) states …
Organisation Name. (date of publication). Title. Publisher if different from author. URL
NSW Education Standards Authority. (2019). Personal development, health and physical education K-10 syllabus. https://educationstandards.nsw.edu.au/wps/portal/nesa/k-10/learning-areas/pdhpe/pdhpe-k-10-2018 (make sure you indent the second line and subsequent lines)