Gaya APA

Hasibuan, H, A. et al (2013). Panduan Analisis Kadar Minyak & Inti Buah Sawit (Spikelet Sampling) . Medan: Pusat Penitian Kelapa Sawit.

Gaya MLA

Hasibuan, Hasrul, Abdi. et al. "Panduan Analisis Kadar Minyak & Inti Buah Sawit (Spikelet Sampling)". Medan: Pusat Penitian Kelapa Sawit, 2013. Text.