APA (7th ed.) Citation

Dongni, B., & Jun, H. (2021). Timmy Understands Refraction. WS Educations.

Chicago Style (17th ed.) Citation

Dongni, Bao, and Hong Jun. Timmy Understands Refraction. Singapore: WS Educations, 2021.

MLA (9th ed.) Citation

Dongni, Bao, and Hong Jun. Timmy Understands Refraction. WS Educations, 2021.

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