Gaya APA
Supriatna, J., LENZ, R. (2022).
Sustainable Environmental Management (1).
Jakarta:
Yayasa Pustaka Obor Indonesia.
Gaya MLA
Supriatna, Jatna., LENZ, RALPH.
"Sustainable Environmental Management".
1
Jakarta:
Yayasa Pustaka Obor Indonesia,
2022.
Text.