APA

Silberzahn B. E., Morris M. B., Riegger K. E., White R. H., Tomko C. A., Park J. N., Footer K. H. A., Huettner S. S. & Sherman S. G. (20201001). Barriers and facilitators to retaining a cohort of street-based cisgender female sex workers recruited in Baltimore, Maryland, USA: results from the SAPPHIRE study. : BMC public health.

Chicago

Silberzahn Bradley E, Morris Miles B, Riegger Katelyn E, White Rebecca Hamilton, Tomko Catherine A, Park Ju Nyeong, Footer Katherine H A, Huettner Steven S and Sherman Susan G. 20201001. Barriers and facilitators to retaining a cohort of street-based cisgender female sex workers recruited in Baltimore, Maryland, USA: results from the SAPPHIRE study. : BMC public health.

Harvard

Silberzahn B. E., Morris M. B., Riegger K. E., White R. H., Tomko C. A., Park J. N., Footer K. H. A., Huettner S. S. and Sherman S. G. (20201001). Barriers and facilitators to retaining a cohort of street-based cisgender female sex workers recruited in Baltimore, Maryland, USA: results from the SAPPHIRE study. : BMC public health.

MLA

Silberzahn Bradley E, Morris Miles B, Riegger Katelyn E, White Rebecca Hamilton, Tomko Catherine A, Park Ju Nyeong, Footer Katherine H A, Huettner Steven S and Sherman Susan G. Barriers and facilitators to retaining a cohort of street-based cisgender female sex workers recruited in Baltimore, Maryland, USA: results from the SAPPHIRE study. : BMC public health. 20201001.