APA引文

Altman, I. (1961). Changes in physician-population ratios among the States.

Citação norma Chicago

Altman, Isidore. Changes in Physician-population Ratios Among the States. 1961.

MLA引文

Altman, Isidore. Changes in Physician-population Ratios Among the States. 1961.

警告：這些引文格式不一定是100％准確.