APA ציטוט

Lipsey, R. G. (1963). An introduction to positive economics. London: Weidenfeld and Nicolson.

Trích dẫn kiểu Chicago

Lipsey, Richard G. An Introduction to Positive Economics. London: Weidenfeld and Nicolson, 1963.

ציטוט MLA

Lipsey, Richard G. An Introduction to Positive Economics. London: Weidenfeld and Nicolson, 1963.