APA (7th ed.) Citation

Tagore, R., Andrews, C. F., & Martínez Amador, N. M. (1931). Cartas a un amigo: Letters to a friend. Juventud.

Chicago Style (17th ed.) Citation

Tagore, Rabindranath, C. F. Andrews, and Nicolás María Martínez Amador. Cartas a Un Amigo: Letters to a Friend. Barcelona: Juventud, 1931.

MLA (9th ed.) Citation

Tagore, Rabindranath, et al. Cartas a Un Amigo: Letters to a Friend. Juventud, 1931.