Citazione Stile APA (7a Edizione)

(1970). Perspective on our time: Issues and essays. Houghton Mifflin.

Citazione stile Chigago Style (17a edizione)

Perspective on Our Time: Issues and Essays. Boston: Houghton Mifflin, 1970.

Citatione MLA (9a ed.)

Perspective on Our Time: Issues and Essays. Houghton Mifflin, 1970.