APA

Brackbill R. M., Hadler J. L., DiGrande L., Ekenga C. C., Farfel M. R., Friedman S., Perlman S. E., Stellman S. D., Walker D. J., Wu D., Yu S. & Thorpe L. E. (20090811). Asthma and posttraumatic stress symptoms 5 to 6 years following exposure to the World Trade Center terrorist attack. : JAMA.

Chicago

Brackbill Robert M, Hadler James L, DiGrande Laura, Ekenga Christine C, Farfel Mark R, Friedman Stephen, Perlman Sharon E, Stellman Steven D, Walker Deborah J, Wu David, Yu Shengchao and Thorpe Lorna E. 20090811. Asthma and posttraumatic stress symptoms 5 to 6 years following exposure to the World Trade Center terrorist attack. : JAMA.

Harvard

Brackbill R. M., Hadler J. L., DiGrande L., Ekenga C. C., Farfel M. R., Friedman S., Perlman S. E., Stellman S. D., Walker D. J., Wu D., Yu S. and Thorpe L. E. (20090811). Asthma and posttraumatic stress symptoms 5 to 6 years following exposure to the World Trade Center terrorist attack. : JAMA.

MLA

Brackbill Robert M, Hadler James L, DiGrande Laura, Ekenga Christine C, Farfel Mark R, Friedman Stephen, Perlman Sharon E, Stellman Steven D, Walker Deborah J, Wu David, Yu Shengchao and Thorpe Lorna E. Asthma and posttraumatic stress symptoms 5 to 6 years following exposure to the World Trade Center terrorist attack. : JAMA. 20090811.