APA Format
Walker, Samuel;
. (1983). The police in America : an introduction
/ Samuel Walker
. New York : McGraw-Hill
MLA Format
Walker, Samuel;
. The police in America : an introduction
/ Samuel Walker
. New York : McGraw-Hill, 1983
Chicago Format
Walker, Samuel;
. The police in America : an introduction
/ Samuel Walker
. New York : McGraw-Hill, 1983
Australian/Harvard Format
Walker, Samuel;
. 1983. The police in America : an introduction
/ Samuel Walker
. McGraw-Hill New York