APA (7th ed.) Citation

Pagels, H. R. (1990). Simetria perfeita. Gradiva.

Chicago Style (17th ed.) Citation

Pagels, Heinz R. Simetria Perfeita. Gradiva, 1990.

MLA (8th ed.) Citation

Pagels, Heinz R. Simetria Perfeita. Gradiva, 1990.

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