Gaya APA

Sempos, C, T. et al (2017). Cost effective measures to standardize serum 25(OH)D values from completed studies (Osteoporos Int (2017) 28:1503–1505). USA: Springer.

Gaya MLA

Sempos, C., T.. et al. "Cost effective measures to standardize serum 25(OH)D values from completed studies". Osteoporos Int (2017) 28:1503–1505 USA: Springer, 2017. Text.