Yudaputra, A., R. N. Zulkarnaen, I. F. Wanda, and J. R. Witono. “Flowering of Areca Catechu in Bogor Botanic Gardens”. Berkala Penelitian Hayati, Vol. 22, no. 1, Mar. 2017, pp. 32-37, doi:10.23869/74.