For multistage residual income valuation and an ROE that declines to a long-run level, it seems that the CFAI and Schweser notes are giving inconsistent formulas. As seen in equation 8, CFAI has the formula as (P_{t} - B_{t}) / (1 + r) but Schweser has it as (P_{t} - B_{t}) + R_{t} / (1 + r). Can someone please help clarify the correct one or explain what I am misunderstanding? Thank you!

P_{t} = market price at time t

B_{t} = book value per share at time t

R_{t} = residual income at time t

r = RoR