Santiyo Wibowo and Sri Komarayati, “SIFAT FISIKO KIMIA MINYAK CUPRESUS (Cupressus benthamii) ASAL AEK NAULI, PARAPAT SUMATERA UTARA”, J. Penelitian Hasil Hutan, vol. 33, no. 2, pp. 93–103, Aug. 2015.