APA Citation

(2011). Tropis: Sawit kunci ekonomi sumut. Jakarta: Warta Alam Tropis.

Chicago Style Citation

Tropis: Sawit Kunci Ekonomi Sumut. Jakarta: Warta Alam Tropis, 2011.

MLA Citation

Tropis: Sawit Kunci Ekonomi Sumut. Jakarta: Warta Alam Tropis, 2011.

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