What is the reaction between oxalic acid and ammonium hydroxide?

One mole of Oxalic Acid and 2 moles of Ammonium Hydroxide forms one mole Ammonium Oxalate and 2 moles of Water molecul.

(COOH)2 + 2 NH4OH ---------> COONH4 - COONH4 + 2 H2O