Gaya APA
Soemarwoto, O., }, S., W., W., {., E., A. (1981).
Environmental Education and Research in Indonesian Universities .
Hong Kong:
Maruzen Asia.
Gaya MLA
Soemarwoto, O., }, S., W., W., {., E., A..
Environmental Education and Research in Indonesian Universities.
Hong Kong:
Maruzen Asia,
1981.
Text.