APA citiranje

Windham, G. C., & Sever, L. E. (1982). Neural tube defects among twin births.

Citação norma Chicago

Windham, G C., and L E. Sever. Neural Tube Defects Among Twin Births. 1982.

MLA citiranje

Windham, G C., and L E. Sever. Neural Tube Defects Among Twin Births. 1982.