APA

Lipsey R. G., . (1965). An introduction to positive economics. London: Weidenfeld and Nicolson.

Chicago

Lipsey Richard G, . 1965. An introduction to positive economics. London: Weidenfeld and Nicolson.

Harvard

Lipsey R. G., . (1965). An introduction to positive economics. London: Weidenfeld and Nicolson.

MLA

Lipsey Richard G, . An introduction to positive economics. London: Weidenfeld and Nicolson. 1965.