If you need to disable one of your Job Sources follow the next steps.
Go to your Settings and select "Job Sources" from the top menu. Then select the Job Source you wish to disable.
When the Job Source's profile pops up, select the option to disable at the top of the screen. You will get a pop up asking if you're sure, click "Yes, Disable Job Source!". This will be followed by an alert indicating that the changes have been made.
This Job Source will be temporarily disabled and you will not be able to create tickets under said job source.
If you wish to enable that Job Source back, follow the same steps to get to the Job Source's profile and you will have an option to "Enable" job source instead of disable. Click on it and then select "Yes, activate Job Source!" on the pop up. This will be followed by an alert indicating that changes have been made.
Please don't hesitate to contact Support if you need further assistance.