APA引文

Weeks, J. L. (1986). Trends in fatality rates in bituminous coal mines, 1970-85.

Citação norma Chicago

Weeks, J L. Trends in Fatality Rates in Bituminous Coal Mines, 1970-85. 1986.

MLA引文

Weeks, J L. Trends in Fatality Rates in Bituminous Coal Mines, 1970-85. 1986.

警告：這些引文格式不一定是100％准確.