Just using their regular stiudo albums I'd have to say:
1971 Led Zeppelin IV (ZOSO)
Released: 8 November, 1971
Label: Atlantic
Format: LP
Track listing
Side one
No. Title Writer(s) Length
1. "Black Dog" Jimmy Page, Robert Plant, John Paul Jones 4:57
2. "Rock and Roll" Page, Plant, Jones, John Bonham 3:40
3. "The Battle of Evermore" Page, Plant 5:52
4. "Stairway to Heaven" Page, Plant 8:02
Side two
No. Title Writer(s) Length
1. "Misty Mountain Hop" Page, Plant, Jones 4:38
2. "Four Sticks" Page, Plant 4:46
3. "Going to California" Page, Plant 3:31
4. "When the Levee Breaks" Memphis Minnie, Page, Plant, Jones, Bonham 7:07
If using their Compilation albums I'd have to go with:
2008 Definitive Collection
Released: 4 November, 2008
Label: Atlantic/Rhino
Format: CD
Track Listing too long to enclose, sorry.
Oh, if you want the track listing you can go to wikipedia.org
enter led zeppelin
go to discography
go to Compilation albums
It is the last one listed. It contains 12 discs.