Google+ Linking out contributors for SEO & Marketing?

[Imisidro2]

You need to do the Google+ authorship

Here are instructions with regards to Google+ Authorships to link content you publish on a specific domain to your Google+ profile:

1 - Make sure you have a profile photo with a recognizable headshot.
2 - Make sure a byline containing your name appears on each page of your content (for example, "By Steven Levy").
3 - Make sure your byline name matches the name on your Google+ profile.
4 - Verify you have an email address (such as stevenlevy@wired.com) on the same domain as your content. (Don't have an email address on the same domain? Use this method to link your content to your Google+ profile)

Do this process. Be sure that the contributors have email from your domain

However, if you just want to use rel author markup, use this process https://support.google.com/webmasters/an...9557?hl=en