On page 836 of the HTCE (p.680 of HTCEV) book Bittman has a description of different types of flour. On this page I have written down the weights of the flours for one cup (non-sifted) and one cup sifted.
Here are the numbers for your reference:
- AP: 140g/115g
- Bread: 160g/130g
- Cake: 130g/100g
- Whole Wheat: 150g/130g