How to show a collection

How can I show a collection inside a page?
This is my .md page

title: 'Quote Archive '
published: true
metadata:
keywords: 'home'
taxonomy:
category:

• main
  tag:
• 'home'
  menu: 'Home'
  slug: home
  process:
  markdown: false
  twig: true
  routable: true
  cache_enable: true
  visible: true
  content:
  items: '@root'
  TWIGCopy

  {% for p in page.collection %}
  <h2> {{ p.title }} </h2>
  {{ p.summary }}
  {% endfor %} 
  

this is the result:

how can I not show the collection code before the collection?

I really can't tell with your paste of the .md page, you should paste it between triple backticks.

sorry for the bad paste. My problem is:
If I have a page writed this way:
(savedd home.en.md)

title: 'Home'
published: true
metadata:
    keywords: 'home'
taxonomy:
    category:        - main
    tag: - 'home'
menu: 'Home'
slug: home
process:
    twig: true
routable: true
cache_enable: true
visible: true
content:
    items: @root
    order:
        by: date
        dir: desc 
    limit: 10
    pagination: true

and this flat text after "This Are all our Pages:"

how and where do I have to add the twig text?

{% for p in page.collection %}
<h3> {{ p.title }} </h3>
 {{ p.summary }}
{% endfor %}
---