APA

Sellars R. W., . (1926). The principles and problems of philosophy. New York: Macmillan.

Chicago

Sellars Roy Wood, . 1926. The principles and problems of philosophy. New York: Macmillan.

Harvard

Sellars R. W., . (1926). The principles and problems of philosophy. New York: Macmillan.

MLA

Sellars Roy Wood, . The principles and problems of philosophy. New York: Macmillan. 1926.