Cita APA (7th ed.)

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

Cita Chicago (17th ed.)

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

Cita MLA (9th ed.)

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