APA

Sayre P. L., . (1951). An introduction to a philosophy of law. Iowa City: State University of Iowa.

Chicago

Sayre Paul Lombard, . 1951. An introduction to a philosophy of law. Iowa City: State University of Iowa.

Harvard

Sayre P. L., . (1951). An introduction to a philosophy of law. Iowa City: State University of Iowa.

MLA

Sayre Paul Lombard, . An introduction to a philosophy of law. Iowa City: State University of Iowa. 1951.