Ervan Johan Wicaksana UNIPMA PGRI Madiun, 85 Setia Budi Street, Madiun, East Java, Indonesia
Magister Science, Faculty of Teacher and Education at Sebelas Maret University Surakarta (UNS), Indonesia Indonesia
Maridi Maridi Sebelas Maret University Surakarta (UNS) Indonesia
Sutarno Sutarno Sebelas Maret University Surakarta (UNS) Indonesia
Biology Department, Faculty of Mathematics and Natural Sciences, Universitas Negeri Malang,Building O-5 Jl. Cakrawala No.2 Malang 65145 Tel / Fax. (0341) 588077 (direct), (0341) 551312 line 262