Cita APA (7th ed.)

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

Cita Chicago (17th ed.)

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

Cita MLA (9th ed.)

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