Navigate to the Export tab. Under BibLaTeX, make sure 'Export unicode as plain-text latex commands' is checked. Open the 'Add URLs to BibTeX export' drop down and select 'in a note filed'. Some APA citation types require a URL so you want your bibliographic file to include them. Open the 'When a reference has both a DOI and a URL, export' drop down and select 'DOI'. This will ensure that your LaTeX references does not simultaneously include a URL and DOI.