I have been trying to add internal reference to the website. I have tried these two solutions but they do not seem to work without errors.

I'm assuming my template has a different name in the template for the internal reference code?

https://www\.odoo\.com/forum/help\-1/how\-can\-i\-display\-product\-internal\-reference\-on\-the\-e\-commerce\-page\-on\-odoo\-10\-119760


https://www.odoo.com/forum/help-1/how-can-i-display-product-internal-reference-on-the-e-commerce-page-on-odoo-10-119760