Gaya APA
Moral science series. (1961).
tempaterbit:
penerbit.
Gaya Chicago
Moral science series.
Edisi.
tempaterbit:
penerbit,
1961.
Text.
Gaya MLA
Moral science series.
Edisi.
tempaterbit:
penerbit,
1961.
Text.
Gaya Turabian
Moral science series.
tempaterbit:
penerbit,
1961.
Print.