How would multiple mana doublers stack?
If you have all of those together and you tap a land for mana, Mana Reflection doubles the amount of mana produced by the land's ability, and then Zendikar Resurgent and Mirari's Wake each have an ability that produces 1 more mana, for a total of 4 mana with most simple lands.
Mana Reflection's ability says

If you tap a permanent for mana, it produces twice as much of that mana instead.

This directly modifies the mana produced by the land's ability.
On the other hand, Zendikar Resurgent and Mirari's Wake both have abilities that say

Whenever you tap a land for mana, add one mana of any type that land produced.

These are triggered abilities that triggers from activating and resolving the land's ability. These abilities produce mana separately from the land's ability, so they are not modified by Mana Reflection.