APA (7th ed.) Citation

Csapó, B., & Funke, J. (2017). The development and assessment of problem solving in 21st-century schools. The nature of problem solving. https://doi.org/10.1787/9789264273955-3-en

Chicago Style (17th ed.) Citation

Csapó, Benő, and Joachim Funke. "The Development and Assessment of Problem Solving in 21st-century Schools." The Nature of Problem Solving 2017. https://doi.org/10.1787/9789264273955-3-en.

MLA (9th ed.) Citation

Csapó, Benő, and Joachim Funke. "The Development and Assessment of Problem Solving in 21st-century Schools." The Nature of Problem Solving, 2017, https://doi.org/10.1787/9789264273955-3-en.