APA (7th ed.) Citation

Unamuno, M. d., Río, A. d., & Agostini de del Río, A. (1947). Abel Sánchez: Unabridged novel of Miguel de Unamuno. Holt, Rinehart and Winston.

Chicago Style (17th ed.) Citation

Unamuno, Miguel de, Angel del Río, and Amelia Agostini de del Río. Abel Sánchez: Unabridged Novel of Miguel De Unamuno. New York: Holt, Rinehart and Winston, 1947.

MLA (9th ed.) Citation

Unamuno, Miguel de, et al. Abel Sánchez: Unabridged Novel of Miguel De Unamuno. Holt, Rinehart and Winston, 1947.