Citação norma APA

Witsell, A. L., & Schook, L. B. (1992). Tumor necrosis factor alpha is an autocrine growth regulator during macrophage differentiation. Proc Natl Acad Sci U S A.

Citação norma Chicago

Witsell, A L., and L B. Schook. "Tumor Necrosis Factor Alpha Is an Autocrine Growth Regulator During Macrophage Differentiation." Proc Natl Acad Sci U S A 1992.

Citação norma MLA

Witsell, A L., and L B. Schook. "Tumor Necrosis Factor Alpha Is an Autocrine Growth Regulator During Macrophage Differentiation." Proc Natl Acad Sci U S A 1992.

Nota: a formatação da citação pode não corresponder 100% ao definido pela respectiva norma.