B. Budianto
Chemical Engineering Department, Institute Sains and Technology Al-Kamal
Indonesia

Budianto B. - Doctor, Lecturer, Chemical Engineering Department, Institute of Science and Technology Al Kamal.

Jalan Raya Al-Kamal, No. 2, Kebon Jeruk. Jakarta. Tel.: +628–138–584–71–37

Z. O. Feri
Universitas Negeri Yogyakarta
Indonesia

Zefki Okta Feri - PhD Student in Language Education Science, Yogyakarta State University.

Sleman Regency Kampus Karang malang Yogyakarta, Sleman, 55281 Yogyakarta SR,Tel.: +628–523–108–37–16

A. Suparmi
Universitas Negeri Yogyakarta; SMA Negeri 4 Tarakan
Indonesia

Anik Suparmi - M. Pd, Student in Education Biologi, Yogyakarta State University.

Sleman Regency Kampus Karang malang Yogyakarta, Sleman, 55281 Yogyakarta SR Teacher, SMA Negeri 4 Tarakan. 8H2Q+C88, Selumit, Tarakan Tengah, City, North Kalimantan, Tel.: +628–524–779–44–18