Gaya APA

Umaly, R, C. et al (1990). Symposium on Agroforestry systems and technologies ,Bogor,Indonesia, 19-21 September 1989 . Bogor: Seamod Biotrop.

Gaya MLA

Umaly, Ruben, C.. et al. "Symposium on Agroforestry systems and technologies ,Bogor,Indonesia, 19-21 September 1989". Bogor: Seamod Biotrop, 1990. Text.