Celebrates the 20th anniversary of the Hanna-Barbera partnership.
| Release Date | November 24, 1977 | |
|---|---|---|
| Status | Released | |
| Original Title | Yabba Dabba Doo! The Happy World of Hanna-Barbera | |
| Runtime | 2h 0min | |
| Budget | — | |
| Revenue | — | |
| Language | — | |
| Original Language | English | |
| Production Countries | United States of America | |
| Production Companies | Hanna-Barbera Productions | |