Versions
| Title, Format | Label | Cat# | Country | Year | |
|---|---|---|---|---|---|
| Friends (12") | MCA Records Ltd. | MCAT 1352 | UK | 1989 | |
| Friends ("Unity" Remix) (12") | MCA Records Ltd. | MCAX 1352 | UK | 1989 | |
| Friends (12") | MCA Records | 257 536-0 | Germany | 1989 | |
| Friends (12") | MCA Records (Canada) | MCA-23956 | US | 1989 | |
| Friends (12") | WEA Records Pty Ltd. | 0-23956 | Australia | 1989 | |
| Friends (12", Promo) | MCA Records Ltd. | WMCAT 1352 | UK | 1989 | |
| Friends (12", Promo) | MCA Records | L33-17857 | US | 1989 | |
| Friends (12", Single) | MCA Records | MCA-23956 | US | 1989 | |
| Friends (7") | MCA Records | 257 535-7 | Germany | 1989 | |
| Friends (7") | MCA Records | MCA 1352 | UK | 1989 | |
| Friends (7") | MCA Records | MCA-53660 | US | 1989 | |
| Friends (CD, Mini) | MCA Records | 257 536-2 | Germany | 1989 | |
| Friends (CD, Single, Promo) | MCA Records | CD45-17864 | US | 1989 | |
| Friends (Cass, Single) | MCA Records | MCAC-53660 | US | 1989 | |
| Friends (Cass, Single) | MCA Records | MCAC-1352 | US | 1989 |