Cita APA (7a ed.)

Ekeland, I., & Browder, F. E. (1988). Mathematics and the unexpected. University of Chicago Press.

Cita Chicago Style (17a ed.)

Ekeland, Ivar, y Felix E. Browder. Mathematics and the Unexpected. Chicago [etc.]: University of Chicago Press, 1988.

Cita MLA (9a ed.)

Ekeland, Ivar, y Felix E. Browder. Mathematics and the Unexpected. University of Chicago Press, 1988.