Cita APA (7a ed.)

Unamuno y Jugo, M. d. (1945). Perplexities and paradoxes. Greenwood Press.

Cita Chicago Style (17a ed.)

Unamuno y Jugo, Miguel de. Perplexities and Paradoxes. New York: Greenwood Press, 1945.

Cita MLA (9a ed.)

Unamuno y Jugo, Miguel de. Perplexities and Paradoxes. Greenwood Press, 1945.