APA (7th ed.) Citation

Burckhardt, T., & Gutiérrez, F. (1992). Símbolos (2a ed.). Olañeta.

Chicago Style (17th ed.) Citation

Burckhardt, Titus, and Francisco Gutiérrez. Símbolos. 2a ed. Palma de Mallorca: Olañeta, 1992.

MLA (9th ed.) Citation

Burckhardt, Titus, and Francisco Gutiérrez. Símbolos. 2a ed. Olañeta, 1992.

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