Single quotation marks for terminology

[Natalee92]

If I talk about standard terms in linguistics, as in the example:

"This affix is often called a linking element, an interfix or an intermorph"

Can I just leave the terms as they are, without using quotation marks?Or I should put them in quotation marks? Is it optional?

(By contrast: This affix is often called a 'linking element', an 'interfix' or an 'allomorph')

 

[probus]

You should of course say "Or should I" rather than "Or I should". But in my opinion you don't need any additional punctuation.

 

[Natalee92]

Thank you.