APA (7th ed.) Citation

Sinaga, T., Cooper, C., & Achmadi, S. (2000). Materi. Balai Pustaka.

Chicago Style (17th ed.) Citation

Sinaga, Tuntun, Christopher Cooper, and Suminar Achmadi. Materi. Balai Pustaka, 2000.

MLA (8th ed.) Citation

Sinaga, Tuntun, et al. Materi. Balai Pustaka, 2000.