Dyfyniad APA

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

Dyfyniad Arddull Chicago

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

Dyfyniad MLA

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

Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.