Gaya APA
Philosophy: history and problems. (0000).
~:
~.
Gaya Chicago
Philosophy: history and problems.
~.
~:
~,
0000.
Buku.
Gaya MLA
Philosophy: history and problems.
~.
~:
~,
0000.
Buku.
Gaya Turabian
Philosophy: history and problems.
~:
~,
0000.
Buku.