| Label: | MCA Records L33-1288 |
| Genre: | Electronic, Funk / Soul |
| Style: | Disco |
| Format: | Vinyl (12" , 33 ⅓ RPM , Promo) |
| A | (I Guess) It Must Be Love | 3:59 |
| B1 | (I Guess) It Must Be Love | 7:20 |
| B2 | (I Guess) It Must Be Love (Instrumental) | 9:25 |
| Label: | MCA Records MCAT 940 |
| Genre: | Electronic, Funk / Soul |
| Style: | Disco |
| Format: | Vinyl (12") |
| A | (I Guess) It Must Be Love (Extended Version) » Producer, Written-By: Monte Moir | 8:59 |
| B | Working Girl | 4:53 |
| Label: | MCA Records MCA-52489 |
| Genre: | Electronic, Funk / Soul |
| Style: | Disco |
| Format: | Vinyl (7" , Single) |
| A | (I Guess) It Must Be Love » Written-By: M. Moir | 3:59 |
| B | Running In Circles » Written-By: B. Unger, J. Carin, M. Caronia, R. Perrone | 3:48 |
| Label: | MCA Records MCA 940 |
| Genre: | Electronic, Funk / Soul |
| Style: | Disco |
| Format: | Vinyl (7") |
| A | (I Guess) It Must Be Love » Producer, Written-By: Monte Moir | 3:48 |
| B | Working Girl | 3:48 |