Where do I get information on how to blend oils to burn in my oil diffuser?

Here is a site to try ...Where do I get information on how to blend oils to burn in my oil diffuser?
white barn candle (part of bath %26amp; body works) has a pamphlet called ';top 20 oil combinations'; - they are amazing !!! the pamphlet is by HARRY SLATKIN., a renowned home fragrance designer.Where do I get information on how to blend oils to burn in my oil diffuser?
u could go to a site on aromatherapy