Preheat the oven to 375˚ Fahrenheit.
In a large mixing bowl, combine flour, baking soda, spices, salt, and sugars. Mix well.
To the dry ingredients add eggs, pumpkin puree, melted butter, and sourdough starter. Mix until well combined.
Grease and flour a 9" x 5" loaf pan.
Pour the dough into the prepared loaf pan.
Bake the pumpkin bread for about 60 minutes or until a knife or toothpick inserted into the center comes out clean.
Let cool for 10 minutes. Remove from the loaf pan and let it cool completely on a wire rack.