Reed, P., Reed, P., & Morgan, T. A. (2008). Effect on subsequent fixed-interval schedule performance of prior exposure to ratio and interval schedules of reinforcement. Learning & Behavior, 36(2), pp. 82-91. doi:10.3758/LB.36.2.82

Reed, Phil, P. Reed, and T. A. Morgan. "Effect On Subsequent Fixed-interval Schedule Performance of Prior Exposure to Ratio and Interval Schedules of Reinforcement." Learning & Behavior 36, no. 2 (2008): 82-91.

Reed, Phil, P. Reed, and T. A. Morgan. "Effect On Subsequent Fixed-interval Schedule Performance of Prior Exposure to Ratio and Interval Schedules of Reinforcement." Learning & Behavior 36.2 (2008): 82-91.