Philosophy of natural science.

MLA

Hempel, C.G. Philosophy of Natural Science. Englewood Cliffs: Prentice-Hall inc., .

APA

Hempel, C. (.). Philosophy of natural science. Englewood Cliffs: Prentice-Hall inc.

Chicago

Hempel, C.G. Philosophy of Natural Science. Englewood Cliffs: Prentice-Hall inc., ..