APA (7th ed.) Citation

Feynman, R. P. (1988). "Está a brincar, Sr. Feynman!". Gradiva.

Chicago Style (17th ed.) Citation

Feynman, Richard P. "Está a Brincar, Sr. Feynman!". Gradiva, 1988.

MLA (8th ed.) Citation

Feynman, Richard P. "Está a Brincar, Sr. Feynman!". Gradiva, 1988.

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