APA

Hospers J., . (1961). Human conduct: an introduction to the problems of ethics. New York: Harcourt & world.

Chicago

Hospers John, . 1961. Human conduct: an introduction to the problems of ethics. New York: Harcourt & world.

Harvard

Hospers J., . (1961). Human conduct: an introduction to the problems of ethics. New York: Harcourt & world.

MLA

Hospers John, . Human conduct: an introduction to the problems of ethics. New York: Harcourt & world. 1961.