APA استشهاد

Hutchison, T. W. (1964). 'Positive' economics and policy objectives. George allen and unwin.

استشهاد بنمط شيكاغو

Hutchison, T. W. 'Positive' Economics and Policy Objectives. London: George allen and unwin, 1964.

MLA استشهاد

Hutchison, T. W. 'Positive' Economics and Policy Objectives. George allen and unwin, 1964.