Cita APA (7a ed.)

Friedman, R. W., Norris, D. F., & Shandy, S. G. (1987). Law enforcement needs in Calvert County, Maryland to the year 2000. Inst. for Governmental Service.

Cita Chicago Style (17a ed.)

Friedman, Richard W., Donald F. Norris, y Steven G. Shandy. Law Enforcement Needs in Calvert County, Maryland to the Year 2000. College Park, Md: Inst. for Governmental Service, 1987.

Cita MLA (8a ed.)

Friedman, Richard W., et al. Law Enforcement Needs in Calvert County, Maryland to the Year 2000. Inst. for Governmental Service, 1987.