Get child title

Hi,

I have 2 types that have child field in them for another 'parent' type. I would like to display links to child records in this 'parent' type record. I can't do this with parent field since I can't select multiple types and sections.

Child 1 - child field (I can add and attach Parent record here)
Child 2 - child field (I can add and attach Parent record here)
Parent - no parent field*

I'm asking for help how to do this with php.

I'm trying with

<?php
$child = ItemsStore::getRecord($this->item->child_id);
echo 'Child:&nbsp;' . '<a href="'.JRoute::_(Url::record($child->id)).'">'.$child->title.'</a>';
?>

This acctualy displays title of parent record (the one I'm viewing). Do I have to set up parent field* in parent type? If so, how to select multiple types and sections etc?

Regards