Citação norma APA

Walker, B., Stokes, L. D., & Warren, R. (2003). Environmental factors associated with asthma. National Medical Association.

Citação norma Chicago

Walker, Bailus, Lynette D. Stokes, and Rueben Warren. Environmental Factors Associated With Asthma. National Medical Association, 2003.

Citação norma MLA

Walker, Bailus, Lynette D. Stokes, and Rueben Warren. Environmental Factors Associated With Asthma. National Medical Association, 2003.

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