Cita APA (7th ed.)
SELLER, M. NEURAL TUBE DEFECTS AND SEX RATIOS.
Cita Chicago (17th ed.)
SELLER, M.J. NEURAL TUBE DEFECTS AND SEX RATIOS.
Cita MLA (9th ed.)
SELLER, M.J. NEURAL TUBE DEFECTS AND SEX RATIOS.
Atenció: Aquestes cites poden no estar 100% correctes.