Gaya APA
Hempel, Earl G. (1966).
Philosophy of Natural Science .
New Jersey:
Prentice Hall Inc.
Gaya Chicago
Hempel, Earl G.
Philosophy of Natural Science.
New Jersey:
Prentice Hall Inc,
1966.
Text.
Gaya MLA
Hempel, Earl G.
Philosophy of Natural Science.
New Jersey:
Prentice Hall Inc,
1966.
Text.
Gaya Turabian
Hempel, Earl G.
Philosophy of Natural Science.
New Jersey:
Prentice Hall Inc,
1966.
Print.