Pagels, H. R. (1990). Simetria perfeita. Gradiva.
Chicago Style (17th ed.) CitationPagels, Heinz R. Simetria Perfeita. Gradiva, 1990.
MLA (8th ed.) CitationPagels, Heinz R. Simetria Perfeita. Gradiva, 1990.
Warning: These citations may not always be 100% accurate.