How to cite page from section-page number style document?

I've come across a problem during my bachelor thesis.

I'd like to cite a single page in a document, but it uses the "section-page" style of numbering pages of the document. It appear like I'm referencing pages 7 to 23, even it is just a single page. (I am using ISO 690)

What's the proper way to cite such page? Thank you.