Gaya APA

KEHUTANAN, B, P. (1989). BULETIN PENELITIAN KEHUTANAN (Cetakan I). TAPANULI: CENTER FOR INERNTNAL FORESTRY RESEARCH.

Gaya MLA

KEHUTANAN, BALAI, PENELITIAN. "BULETIN PENELITIAN KEHUTANAN". Cetakan I TAPANULI: CENTER FOR INERNTNAL FORESTRY RESEARCH, 1989. Text.