If you have a well designed program, the physical training (Speed Progression, Plyos, Strength Training, General Endurance, Tempo, etc) would not differ significantly from sprint training - you just have the added technical work.
But the physical training is at the core.
Good places to look at well-designed training (for multi-events) and sprint/strength training in general:
http://www.elitetrack.com and
http://www.charliefrancis.com