Gaya APA
Riyadi, , S.
(1989).
Widyaparwa No. 28-32, Th. 1989
(
1)
.
Yogyakarta:
Balai Penelitian Bahasa.
Gaya MLA
Riyadi, , Slamet.
"Widyaparwa No. 28-32, Th. 1989".
1
Yogyakarta:
Balai Penelitian Bahasa,
1989.
.