Gaya APA
Nasional, B, S. (1991).
Tata cara perencanaan umum krib disungai .
Jakarta:
South-Western College Publishing.
Gaya MLA
Nasional, Badan, Standarisasi.
"Tata cara perencanaan umum krib disungai".
Jakarta:
South-Western College Publishing,
1991.
Text.