Cita APA (American Psychological Association)

Arana Goiri, L. d., Arana Goiri, S., & Gallastegi Uriarte, E. d. [Carta], 1926 en. 20, a Galastegi'tar Eli.

Citación Chicago Style

Arana Goiri, Luis de, Sabino Arana Goiri, and Elías de Gallastegi Uriarte. [Carta], 1926 En. 20, a Galastegi'tar Eli.

Cita MLA (Modern Language Association of America)

Arana Goiri, Luis de, et al. [Carta], 1926 En. 20, a Galastegi'tar Eli.