Cite source at the end

Is there a way to have a last line with the source of the cheatsheet?
Example:

user:~# curl cheat.sh/iptables

Answer:

> \# iptables
> \# Program that allows configuration of tables, chains and rules provided by the Linux kernel firewall.
> \# View chains, rules, and packet/byte counters for all tables:
> sudo iptables -vnL
> ...
> \# Restore iptables configuration from a file:
> sudo iptables-restore < path/to/iptables_file
> **[Source: tldr pages]**

Or

> **[Source: stackoverlow]**

It would be helpful to know "hum ok, if I go on tldr.sh, will I see the same content, ... or maybe is this already the content from tldr.sh?"

The issue does not name an implementation file, test, or entry point. Start by tracing how a cheatsheet such as iptables is selected and rendered, then determine where source attribution could be represented; done means the response shows a correct source link or label without disrupting existing cheatsheet output.

Written by the indexing model from the issue text.