APA Citation

Mary, J. G. (2000). Ruang & Waktu. Balai Pustaka.

Chicago Style Citation

Mary, John Gribbin. Ruang & Waktu. Balai Pustaka, 2000.

MLA Citation

Mary, John Gribbin. Ruang & Waktu. Balai Pustaka, 2000.

Warning: These citations may not always be 100% accurate.