A quotation is a copy of the words of another, with acknowledgment of the source. If you do not include sources for your quotations, the Reference sub-categories are not right for your site. You might consider submitting it to one of the Society:People:Personal Pages categories. If your site is primarily a sales promotion, please submit it to the appropriate Shopping category.
The Reference:Quotations:Scientific sub-category lists sites which offer quotations by or about science or scientists.

If your site publishes quotes by or about a single scientist, please submit it to the Reference:Quotations:Famous sub-category.