APA

Lewis C. I., . (1969). Values and imperatives: studies in ethics. Stanford, Calif: Stanford University Press.

Chicago

Lewis Clarence Irving, . 1969. Values and imperatives: studies in ethics. Stanford, Calif: Stanford University Press.

Harvard

Lewis C. I., . (1969). Values and imperatives: studies in ethics. Stanford, Calif: Stanford University Press.

MLA

Lewis Clarence Irving, . Values and imperatives: studies in ethics. Stanford, Calif: Stanford University Press. 1969.