Gaya APA

saputro, M, T., matriwati, M. (2013). The effectiveness of the picture exchange communication system (pecs) in teaching speaking skill to children with autism spectrum disorders of Sekolah Luar Biasa Negeri Kabupaten Bekasi at seventh grade of the second semester in the 2012-2013 academic year . Jakarta: .

Gaya MLA

saputro, Muhamad, Tri., matriwati, M.pd. "The effectiveness of the picture exchange communication system (pecs) in teaching speaking skill to children with autism spectrum disorders of Sekolah Luar Biasa Negeri Kabupaten Bekasi at seventh grade of the second semester in the 2012-2013 academic year". Jakarta: , 2013. Text.