APA (7th ed.) Citation

Lopes, A. P., & Soares, F. B. (2015). Math without stress: An open online learning project.

Chicago Style (17th ed.) Citation

Lopes, Ana Paula, and Filomena Baptista Soares. Math Without Stress: An Open Online Learning Project. 2015.

MLA (8th ed.) Citation

Lopes, Ana Paula, and Filomena Baptista Soares. Math Without Stress: An Open Online Learning Project. 2015.

Warning: These citations may not always be 100% accurate.