APA

McLellan D., Marx K., . (1971). The thought of Karl Marx: an introduction. New York: Harper & Row.

Chicago

McLellan David, Marx Karl, . 1971. The thought of Karl Marx: an introduction. New York: Harper & Row.

Harvard

McLellan D., Marx K., . (1971). The thought of Karl Marx: an introduction. New York: Harper & Row.

MLA

McLellan David, Marx Karl, . The thought of Karl Marx: an introduction. New York: Harper & Row. 1971.