APA (7th ed.) Citation

Lubis, Z. Kokom Naik Kelas. Balai Pustaka.

Chicago Style (17th ed.) Citation

Lubis, Zainuddin. Kokom Naik Kelas. Balai Pustaka.

MLA (8th ed.) Citation

Lubis, Zainuddin. Kokom Naik Kelas. Balai Pustaka.

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