Tracklist
| A | Knockin (First Mix) | 5:21 |
| B | Knockin (Radio Version) | 5:10 |
Other versions
| Category | Artist | Title (Format) | Label | Category | Country | Year |
|---|---|---|---|---|---|---|
| Z-12, Z-13 | Double Vision | Knockin (12") | Estanpida Records, Estanpida Records | Z-12, Z-13 | Spain | 1994 |
| PDDCD 0401 | Double Vision | Knockin (CD, Maxi) | Pink Dance Department, CNR Music | PDDCD 0401 | Netherlands | 1995 |
| 01624-12106-2 | Double Vision | Knockin (CD, Maxi) | Popular Records | 01624-12106-2 | USA & Canada | 1996 |
| 843536 170098 | Double Vision | Knockin' 2011 (6xFile, MP3, 320) | Roster Music | 843536 170098 | Spain | 2011 |
| CRAB 12106-1 | Double Vision | Knockin (12", Promo) | Popular Records | CRAB 12106-1 | US | 1996 |
