There are various community covers on YouTube that can provide different stylistic ideas for your own rendition.
The song, released in 1982, is widely regarded as one of Branimir "Johnny" Štulić’s most politically charged works. It references several key historical events: azra_proljece_13_u_decembru_cover_by_pps
To help with your cover of by Azra , it's useful to understand the song's deep historical context and musical structure. Song Meaning & History There are various community covers on YouTube that
The "spring in December" represents a political awakening or revolution occurring during a "cold" period of state control. Lyrics & Chords released in 1982
Specifically the declaration of martial law in Poland on December 13, 1981, to suppress the "Solidarity" union movement.