What is Oxford referencing? ...

Oxford is a citation style that uses footnotes at the bottom of the page rather than in the in - text citation styles used by Harvard and A. P. A.. in the Oxford style a superscripts number is inserted at the point in your essay where you can cite an author's work

what are the options that have to match them to?

my hamster died and my second hamster i got after that one died as well. i also lost two birds named rainbow and kiwi, (they didn't die, they flew off and escaped). i lost a cat named omi, and a dog named snoopie. the best way i got over it is, paying my respects, and just thinking that they were in a happy place. as well as just remembering but not thinking about it all the time, just do fun activities and try not to think about it too much. hope you feel better. i'm sorry about your loss. : (