Gaya APA
Schowengerdt, R, A., Sumartoyo, .
(2001).
Neraca sumberdaya lahan spasial nasional
.
Cibinong:
Bakosurtanal.
Gaya MLA
Schowengerdt, Robert, A.., Sumartoyo, .
"Neraca sumberdaya lahan spasial nasional".
Cibinong:
Bakosurtanal,
2001.
Text.