Q. Hi i want to cite an author with the style Vancouver and I didn’t find this style. How do i do to add it ?

That's not a style that we generally use here at COM. If you are using an EBSCO database you can just grab a citation (see below). Meanwhile, Vancouver Community College has a pretty nice guide: https://library.vcc.ca/media/vcc-library/content-assets/documents/VancouverStyleGuide_ACM_2018.pdf

1. Click on the title of any article or eBook from your list that you want to cite.
2. Click on the Cite icon on the right side of the item page.
3. Citation Format will appear above the article or eBook cited in multiple formats. Select Vancouver style.
4. Copy the citation and paste into paper.