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APA Citation
Feil, E. G., Walker, H. M., Frey, A. J., Seeley, J., Small, J. W., Golly, A., Lee, J., & Forness, S. R. (2021). efficacy Validation of the Revised First Step Program: A Randomized Controlled Trial. Exceptional children, 87, 183–198. http://access.bl.uk/ark:/81055/vdc_100113854731.0x000009