I would say yes, as it's usually sufficient for heritage groups. Source citation advice is in WikiTree help (Sources), with examples. I'd say it could be as simple as a reference citation on the facts provided from it that says "from his child's birth certificate" or "birth certificate for Jakki M" to "M's occupation and age from the birth certificate of Jakki M, that was issued by the hosipital in Month 1968 and in the possession of Jakki M. Copy recorded in Hometown, State/Province, Country. Information transcribed January 28, 2014 by Jakki M." Hope that helps.
p.s. to do a reference (aka footnote), enclose footnote text between <ref></ref> tags. e.g., in your father's biography: Paternal M was a professional wrestler in the 1960s.<ref>Jakki M's birth certificate, Month 1968</ref> Then wherever you want the footnotes listed, have <references />
