Gaya APA

GROENEWALD, C, B. et al (2015). Health care expenditures associated with pediatric pain-related conditions in the United States . Washington DC: IASP.

Gaya MLA

GROENEWALD, Cornelius, B.. et al. "Health care expenditures associated with pediatric pain-related conditions in the United States". Washington DC: IASP, 2015. Artikel.