I understand the CB deal, not everyone has it. For the sake of making characters it's easier to use it and just manually limit sources used. Added benefit, each power card on the pdf is complete so there's no need to reference the book it's from for use in play. For completeness sake though here's a reference list.
Sources
[sblock]Powers
Fallen Needle - Dragon 389
Five Storms - PHB 3, pg 65
Call up the Savage Wind - Heroes of the Elemental Chaos, pg 71
Wind through the Willows - Dragon 404
Strike the Avalanche - PHB 3, pg 69
Tormented Spirit - PHB 3, pg 76
Cyclone Scourge - Heroes of the Elemental Chaos, pg 71
Water Gives Way - Dragon 404
Crane Dance - PHB 3, pg 69
Soul Dance - PHB 3, pg 76
Careful Stride - PHB 3, pg 67
Purifying Meditation - PHB 3, pg 68
Iron Dragon Defense - PHB 3, pg 70[/sblock]