Gaya APA
Warren, R. (2009).
[The Purpose Driven Life.bahasa Batak] Ngolu Na ni amudihon ni sangkap (Batak Toba) .
Jakarta:
Yayasan Del.
Gaya MLA
Warren, Rick.
"[The Purpose Driven Life.bahasa Batak] Ngolu Na ni amudihon ni sangkap (Batak Toba)".
Jakarta:
Yayasan Del,
2009.
Text.