Gaya APA
Gjertsen, Derek. (1989).
Science and Philosophy : Past and Present .
USA:
Penguin Books.
Gaya Chicago
Gjertsen, Derek.
Science and Philosophy : Past and Present.
USA:
Penguin Books,
1989.
Text.
Gaya MLA
Gjertsen, Derek.
Science and Philosophy : Past and Present.
USA:
Penguin Books,
1989.
Text.
Gaya Turabian
Gjertsen, Derek.
Science and Philosophy : Past and Present.
USA:
Penguin Books,
1989.
Print.