APA (7th ed.) Citation

Tobing, R. L. (1989). Panduan pengajar buku kimia bahan alam. Depdikbud.

Chicago Style (17th ed.) Citation

Tobing, Rangke L. Panduan Pengajar Buku Kimia Bahan Alam. Depdikbud, 1989.

MLA (8th ed.) Citation

Tobing, Rangke L. Panduan Pengajar Buku Kimia Bahan Alam. Depdikbud, 1989.

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