From Reminiscences, Jumping Aboard the Train, As if There Won't Be Another by Jeff Sommer, published prior in the 2/17/13 edition of the Sunday Times:
"In a conversation last week, he (Laszlo Birinyi) said we were in the final stage of that bull market. 'The bull market probably has between a year and three years to go,' he said. 'I can't time it. I can only point out the trend.'