Gaya APA

dkk, . et al (1984). Effects Of Ginkgo Biloba Extract On Organic Cerebral Impairment . London: John Libbey & Company ltd.

Gaya MLA

dkk, . et al. "Effects Of Ginkgo Biloba Extract On Organic Cerebral Impairment". London: John Libbey & Company ltd, 1984. Text.