APA (7th ed.) Citation

Tyler, J., & Round, i. G. (1992). Enigmas com números. Gradiva.

Chicago Style (17th ed.) Citation

Tyler, Jenny, and il. Graham Round. Enigmas Com Números. Gradiva, 1992.

MLA (8th ed.) Citation

Tyler, Jenny, and il. Graham Round. Enigmas Com Números. Gradiva, 1992.

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