Adding authors to post

[Atcold]

Perhaps I'm slow… but I cannot figure out how to add two authors to a post I'm writing.
In _layouts/post.html I can see the following:

{%- if page.author -%}
  • {% for author in page.author %}
    <span itemprop="author" itemscope itemtype="http://schema.org/Person">
      <span class="p-author h-card" itemprop="name">{{ author }}</span></span>
      {%- if forloop.last == false %}, {% endif -%}
  {% endfor %}
{%- endif -%}</p>

but it's a little unclear how I'm supposed to pass the authors info in the page header.
For example, the following added to the top of my markdown file does not work:

author:
  name: John Smith
  email: "john.smith@foobar.com"

Additionally, I would like to specify two such authors.
Thanks.

[Atcold]

I think I got it.

author:
 - John Smith
 - Jane Doe

Not sure how to pass more info such as a website.
Also, I understand that only the name field is displayed by the html above.