APA (7th ed.) Citation

Barcos Ana, Ederra María, Vidal Enrique, Ascunce Nieves, Cabanes Anna, Erdozain Nieves, . . . Pollán Marina. (2009). Decline in age at menarche among Spanish women born from 1925 to 1962. BMC.

Chicago Style (17th ed.) Citation

Barcos Ana, Ederra María, Vidal Enrique, Ascunce Nieves, Cabanes Anna, Erdozain Nieves, Lope Virginia, and Pollán Marina. Decline in Age at Menarche Among Spanish Women Born from 1925 to 1962. BMC, 2009.

MLA (9th ed.) Citation

Barcos Ana, et al. Decline in Age at Menarche Among Spanish Women Born from 1925 to 1962. BMC, 2009.

Warning: These citations may not always be 100% accurate.