APA

Billari F. C., Kohler H., Andersson G. & Lundstrom H.Approaching the limit : Long-term trends in late and very late fertility. : .

Chicago

Billari F C, Kohler H.-P, Andersson G and Lundstrom H.Approaching the limit : Long-term trends in late and very late fertility. : .

Harvard

Billari F. C., Kohler H., Andersson G. and Lundstrom H.Approaching the limit : Long-term trends in late and very late fertility. : .

MLA

Billari F C, Kohler H.-P, Andersson G and Lundstrom H.: . .