I'm writing an academic (working) paper, and in the appendix I display a short program I wrote in Stata, a program used for statistical analysis. I wanted to highlight the syntax with colours, so I used Mauricio Caceres Bravo's Stata syntax highlighting markup code, used in LaTeX.
I want to cite his code, but I am not sure of the exact referencing rules for markup code. I have tried Googling this, but most sites simply copy what the University of Arkansas says. That advice doesn't give a list of "types" of code, so I'm not sure what to label Maurico's code (the guide only gives "computer program/source code" as two examples). The APA 7 Referencing Guide lists "Computer Software/Language/Program" as the types.
What type of code is Maurico's, a snippet of markup language, found on GitHub?