Replying to my own question. Basically this can be done the following way:

<#--Get the path where the script is running--#>

$scriptRoot = Split-Path (Resolve-Path $myInvocation.MyCommand.Path)

<#--Assuming all the common helper libraries are in the same folder as the main script, do the following--#>

<#--DatacenterHealthCommonLibrary is just an example library--#>

$common = join-path $scriptRoot "DatacenterHealthCommonLibrary.ps1";

<#--Reference it--#>

.$common;

There are other ways to do it as well as I found upon investigation. One being convert the library to a script module and then import it using the import-Module. Obviously this would require an additional module installation step before 🙂

Cheers 😀

Saptarshi