SpongeBob SquarePants: Season 3 and 4 [DVD] - Best Buy
SpongeBob SquarePants: Season 4 Volume 1 & 2 2006/2007 DVD (2005-2007) - YouTube
Spongebob Squarepants: Complete Ninth Season (dvd) : Target
The Cartoon Revue: SpongeBob SquarePants: DVD Reviews of Seasons 4-5 | Cartoon Amino
Amazon.com: SpongeBob SquarePants - Season 4, Vol. 2 : Tom Kenny, Bill Fagerbakke, Rodger Bumpass, Clancy Brown, Dee Bradley Baker, Mr. Lawrence, Sirena Irwin, Carolyn Lawrence, Annette Heick, Jill Talley, Mary Jo
Spongebob Squarepants: Seasons 1-4 : Movies & TV - Amazon.com
Opening To SpongeBob SquarePants:Season 4, Volume 2 2007 DVD (Disc 1) - YouTube