Ward, D. S., Mazzucca, S., McWilliams, C., & Hales, D. (2015). Use of the Environment and Policy Evaluation and Observation as a Self-Report Instrument (EPAO-SR) to measure nutrition and physical activity environments in child care settings: Validity and reliability evidence. Int J Behav Nutr Phys Act.

Ward, Dianne S., Stephanie Mazzucca, Christina McWilliams, and Derek Hales. "Use of the Environment and Policy Evaluation and Observation As a Self-Report Instrument (EPAO-SR) to Measure Nutrition and Physical Activity Environments in Child Care Settings: Validity and Reliability Evidence." Int J Behav Nutr Phys Act 2015.

Ward, Dianne S., Stephanie Mazzucca, Christina McWilliams, and Derek Hales. "Use of the Environment and Policy Evaluation and Observation As a Self-Report Instrument (EPAO-SR) to Measure Nutrition and Physical Activity Environments in Child Care Settings: Validity and Reliability Evidence." Int J Behav Nutr Phys Act 2015.