Παραπομπή APA

Vickersd, G. (1965). art of judgement: A study of policy making. Chapman & Hall.

Παραπομπή Chicago Style

Vickersd, Geoffrey. Art of Judgement: A Study of Policy Making. London: Chapman & Hall, 1965.

Παραπομπή MLA

Vickersd, Geoffrey. Art of Judgement: A Study of Policy Making. Chapman & Hall, 1965.