Citazione Stile APA (7a Edizione)

Higgins, R. (1982). The seventh enemy: The human factor in the global crisis (Updated ed.). Hodder and Stoughton.

Citazione stile Chigago Style (17a edizione)

Higgins, Ronald. The Seventh Enemy: The Human Factor in the Global Crisis. Updated ed. London [etc.]: Hodder and Stoughton, 1982.

Citatione MLA (9a ed.)

Higgins, Ronald. The Seventh Enemy: The Human Factor in the Global Crisis. Updated ed. Hodder and Stoughton, 1982.