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APA Citation
Ryoo, J. H., Konold, T. R., Long, J. D., Molfese, V. J., & Zhou, X. (2017). nonlinear Growth Mixture Models With Fractional Polynomials: An Illustration With Early Childhood Mathematics Ability. Structural equation modeling, 24(6), 897–910. http://access.bl.uk/ark:/81055/vdc_100050244085.0x000008