Gaya APA
Yuana, K, A., WK, N.
(2010).
The Greatest Philosophers
.
Yogyakarta:
Andi Offset.
Gaya MLA
Yuana, Kumara,, Ari., WK, Nikodemus.
"The Greatest Philosophers".
Yogyakarta:
Andi Offset,
2010.
Text.