APA

Tobin K. E., Hester L., Davey-Rothwell M. A. & Latkin C. A. (092012). An examination of spatial concentrations of sex exchange and sex exchange norms among drug users in Baltimore, Maryland. : Annals of the Association of American Geographers. Association of American Geographers.

Chicago

Tobin Karin Elizabeth, Hester Laura, Davey-Rothwell Melissa Ann and Latkin Carl Asher. 092012. An examination of spatial concentrations of sex exchange and sex exchange norms among drug users in Baltimore, Maryland. : Annals of the Association of American Geographers. Association of American Geographers.

Harvard

Tobin K. E., Hester L., Davey-Rothwell M. A. and Latkin C. A. (092012). An examination of spatial concentrations of sex exchange and sex exchange norms among drug users in Baltimore, Maryland. : Annals of the Association of American Geographers. Association of American Geographers.

MLA

Tobin Karin Elizabeth, Hester Laura, Davey-Rothwell Melissa Ann and Latkin Carl Asher. An examination of spatial concentrations of sex exchange and sex exchange norms among drug users in Baltimore, Maryland. : Annals of the Association of American Geographers. Association of American Geographers. 092012.