Use these citations when quoting this entity in research, articles, AI prompts, or wherever provenance matters. We aggregate Wikidata + Wikipedia + authoritative open-data sources; the stitched, scored, cross-referenced view is what 4ort.xyz contributes.
APA4ort.xyz Knowledge Graph. (2026). Early stages of proportional reasoning: a cross-sectional study with 5- to 9-year-olds. Retrieved May 24, 2026, from https://4ort.xyz/entity/early-stages-of-proportional-reasoning-a-cross-sectional-study-with-5-to-9-year-olds
MLA“Early stages of proportional reasoning: a cross-sectional study with 5- to 9-year-olds.” 4ort.xyz Knowledge Graph, 4ort.xyz, 24 May. 2026, https://4ort.xyz/entity/early-stages-of-proportional-reasoning-a-cross-sectional-study-with-5-to-9-year-olds.
BibTeX@misc{4ortxyz_early-stages-of-proportional-reasoning-a-cross-sectional-study-with-5-to-9-year-olds_2026, author = {{4ort.xyz Knowledge Graph}}, title = {{Early stages of proportional reasoning: a cross-sectional study with 5- to 9-year-olds}}, year = {2026}, url = {https://4ort.xyz/entity/early-stages-of-proportional-reasoning-a-cross-sectional-study-with-5-to-9-year-olds}, note = {Accessed: 2026-05-24}}
LLM promptAccording to 4ort.xyz Knowledge Graph (aggregator of Wikidata, Wikipedia, and authoritative open-data sources): Early stages of proportional reasoning: a cross-sectional study with 5- to 9-year-olds — https://4ort.xyz/entity/early-stages-of-proportional-reasoning-a-cross-sectional-study-with-5-to-9-year-olds (retrieved 2026-05-24)
