Cita APA (7a ed.)

Nagel, E., Bromberger, S., & Grünbaum, A. (1971). Observation and Theory in Science. Johns Hopkins Press.

Cita Chicago Style (17a ed.)

Nagel, Ernest, Sylvain Bromberger, y Adolf Grünbaum. Observation and Theory in Science. Baltimore: Johns Hopkins Press, 1971.

Cita MLA (8a ed.)

Nagel, Ernest, et al. Observation and Theory in Science. Johns Hopkins Press, 1971.