Tracklist
| Don't Think Twice | 2:57 |
| Sassy | 2:12 |
Versions
| Category | Artist | Title (Format) | Label | Category | Country | Year |
|---|---|---|---|---|---|---|
| 40324 | The Wonder Who? | Don't Think Twice (7", Single, Styrene) | Philips | 40324 | US | 1965 |
| 40324 | The Wonder Who? | Don't Think Twice (7") | Philips | 40324 | 1965 | |
| BF 1440, 304082 BF | The Wonder Who? | Don't Think Twice (7", Single) | Philips, Philips | BF 1440, 304082 BF | UK | 1965 |
| BF304082 | The Wonder Who? | Don't Think Twice (7", Single) | Philips | BF304082 | New Zealand | 1965 |
| BF-230 | The Wonder Who? | Don't Think Twice (7", Single) | Philips | BF-230 | Australia | 1965 |
| 304 082 BF | The Wonder Who? | Don't Think Twice (7", Single, Mono) | Philips | 304 082 BF | Netherlands | 1965 |
| 40324 | The Wonder Who? | Don't Think Twice (7", Single, Promo) | Philips | 40324 | US | 1965 |
| 40324 | The Wonder Who? | Don't Think Twice (7", Single, Styrene) | Philips | 40324 | US | 1965 |
| PH.40324 | The Wonder Who? | Sassy (7", Single, Mono) | Philips | PH.40324 | Canada | 1965 |
