APA引文

Sullenberger, D. M., Fulton, K. R., & Cozzarelli, N. R. (1999). Redesign of PNAS: New Covers for the Journal. The National Academy of Sciences.

Citação norma Chicago

Sullenberger, Diane M., Kenneth R. Fulton, and Nicholas R. Cozzarelli. Redesign of PNAS: New Covers for the Journal. The National Academy of Sciences, 1999.

MLA引文

Sullenberger, Diane M., Kenneth R. Fulton, and Nicholas R. Cozzarelli. Redesign of PNAS: New Covers for the Journal. The National Academy of Sciences, 1999.

警告：這些引文格式不一定是100％准確.