Gaya APA

2000, T, I, I, B, T, Y. (1980). Telekomunications in Indonesia by the year 2000 / Perumtel RI . : .

Gaya MLA

2000, Telekomunications, In, Indonesia, By, The, Year. "Telekomunications in Indonesia by the year 2000 / Perumtel RI". : , 1980. Referensi.