90 Millas Songwriting Credits by Gloria Estefan

Authorship on this record splits along a clean line: Estefan writes words, the Gaitán brothers and her husband write music. She takes a lyric credit on ten of the fourteen tracks and a music credit on none of them, so the composition copyrights sit with Alberto Gaitán, Ricardo Gaitán and Emilio Estefan Gómez. Four songs are hers alone as lyricist ("Lo Nuestro", "A Bailar", "Volveré" and, with the two producers, "Esta Fiesta No Va' Acabar"), and four carry no Estefan lyric at all. The release credits also name two players as co-composers that the Wikipedia writer column drops: bassist Salvador "Sal" Cuevas on four tracks and guitarist Marco Linares on three, both of whom played on the sessions. "Morenita" is the outlier, written and produced with the Drop Dead Beats team rather than the Gaitáns, and it is the only track with an electric guitar lead from outside the Latin roster.