Alejandro, G. J. D., Balete, I. K. C., Caagbay, J. F. C., Cruz, J. M. M. B., Narciso, C. J. C., Nazareno, D. E., . . . Uy, M. M. (2011). Polyphyly of Bikkia Reinw. [Rubiaceae] based on multi-locus sequence analysis [ITS, rps16, trnl-F], with emphasis on the endemic Bikkia philippinensis val. including its conservation status. Acta Manilana.
Παραπομπή σε μορφή Chicago (17η εκδ.)Alejandro, Grecebio Jonathan D., Ian Kevin C. Balete, Julian Fabian C. Caagbay, Jana May Marie B. Cruz, Christine Joy C. Narciso, Dominic E. Nazareno, Cecilia I. Banag, και Millard M. Uy. "Polyphyly of Bikkia Reinw. [Rubiaceae] Based on Multi-locus Sequence Analysis [ITS, Rps16, Trnl-F], with Emphasis on the Endemic Bikkia Philippinensis Val. Including Its Conservation Status." Acta Manilana 2011.
Παραπομπή σε μορφή MLA (9th εκδ.)Alejandro, Grecebio Jonathan D., et al. "Polyphyly of Bikkia Reinw. [Rubiaceae] Based on Multi-locus Sequence Analysis [ITS, Rps16, Trnl-F], with Emphasis on the Endemic Bikkia Philippinensis Val. Including Its Conservation Status." Acta Manilana, 2011.