Komunikasi dalam proses keputusan pembelian produk high involvement berbasis teknologi tinggi (studi pada konsumen digital natives dan digital immigrants terhadap pembelian smartphone) = Communication analysis of high involvement decision on high tech product (studied about digital natives abd digital immigrants while taking high involvement decision to smartphone)

Rancang bangun pencatat panggilan telepon untuk sentral telepon digital kecil

Telephony and telegraphy : and introduction to instruments and switching systems (electromechanical and reed-electronic)

Simulasi sentral telepon lokal digital

Electronic switching : digital central office systems of the world