Gaya APA
Internasional..Scirp, (2020).
Journal Of Environmental Protection Vol. 11 No. 4 (Vol. 11 No. 4 Apil 2020).
Florida, USA:
Scirp.
Gaya MLA
Internasional..Scirp, .
Journal Of Environmental Protection Vol. 11 No. 4.
Vol. 11 No. 4 Apil 2020
Florida, USA:
Scirp,
2020.
Jurnal Internasional.