general copyright question

[Saaa]

>>
>> Read that clause carefully. The copyright notice, the list of conditions 
>> and the disclaimer should all be included in the documentation or other 
>> materials. You don't need to output a string, as suggested in another 
>> post, nor do you need to reproduce the copyright for every file used. 
>> With both source and binary distributions practice to include a 
>> license.txt that contains the required text, i.e. one file containing the 
>> complete header found at the top of each source file. That meets the 
>> requirements fine.
>
> /practice/ = it is common practice

Thanks for your reply.
If I include a license.txt people might expect that license to apply to my 
program.
What is common practice to distinguish between licenses from used sources 
and
the license of the compiled program?