APA引文

Kahn, E. M. (1993). Pennsylvania's birth rates after Medicaid abortion restrictions.

Citação norma Chicago

Kahn, E M. Pennsylvania's Birth Rates After Medicaid Abortion Restrictions. 1993.

MLA引文

Kahn, E M. Pennsylvania's Birth Rates After Medicaid Abortion Restrictions. 1993.

警告：這些引文格式不一定是100％准確.