Building Instructions - LEGO 4939: Cool Cars - Book 1
LEGO 4939: Cool Cars | Brickset: LEGO set guide and database
206pcs Cool Cars 3 In 1 Transformable Building Block Sets Toys Gift Compatible With Lego 4939 Decool|compatible with lego|in blockscar blocks - AliExpress
LEGO Set 4939-1-b2 Truck Cab (2007 Creator > Creator 3-in-1) | Rebrickable - Build with LEGO