Gaya APA
PANJAITAN, P. (2011).
Carbon; Notrogen ratio as contreol element in sharimp culture .
Medan:
Universitas HKBP Nommensen.
Gaya MLA
PANJAITAN, Pohan.
"Carbon; Notrogen ratio as contreol element in sharimp culture ".
Medan:
Universitas HKBP Nommensen,
2011.
Artikel.