Gaya APA
Hempel, Carl G. (1966).
Philosophy of natural science (Ed. 1).
United States Of America:
Prentice Hall.
Gaya Chicago
Hempel, Carl G.
Philosophy of natural science.
Ed. 1
United States Of America:
Prentice Hall,
1966.
Text.
Gaya MLA
Hempel, Carl G.
Philosophy of natural science.
Ed. 1
United States Of America:
Prentice Hall,
1966.
Text.
Gaya Turabian
Hempel, Carl G.
Philosophy of natural science.
Ed. 1
United States Of America:
Prentice Hall,
1966.
Print.