Tracklist
| A | –Boney M. | My Friend Jack |
| B1 | –The Undertones | Hard Luck (Again) |
| B2 | –The Undertones | I Don't Wanna See You Again |
Companies, etc.
- Distributed By – WEA Records Ltd.
- Recorded At – Wisseloord Studios
- Published By – Warner Bros. Music Ltd.
- Phonographic Copyright (p) – Sire Records Company
- Pressed By – WEA Records Pressing Plant, West Drayton
Notes
Mispressed issue with Boney M. on A' side My Friend JackOther versions
| Category | Artist | Title (Format) | Label | Category | Country | Year |
|---|---|---|---|---|---|---|
| SIR 4038, SIRE 4038 | The Undertones | My Perfect Cousin (7", Single) | Sire, Sire | SIR 4038, SIRE 4038 | UK | 1980 |
| SIR 4038 | Undertones* | My Perfect Cousin (7", Single) | Sire | SIR 4038 | Australia | 1980 |
| SFL-2484 | アンダートーンズ* = The Undertones | アンダートーンズ* = The Undertones - 僕のいとこはパーフェクト = My Perfect Cousin (7", Promo) | Sire | SFL-2484 | Japan | 1980 |
| SIR 4038 | The Undertones | My Perfect Cousin (7", W/Lbl) | Sire | SIR 4038 | UK | 1980 |
| SIR 4038 NP | The Undertones | My Perfect Cousin (7", Single) | Sire | SIR 4038 NP | Portugal | 1980 |
