Cita APA (7a ed.)

Romer, A. S. (1972). The procession of life. Doubleday.

Cita Chicago Style (17a ed.)

Romer, Alfred Sherwood. The Procession of Life. New York: Doubleday, 1972.

Cita MLA (9a ed.)

Romer, Alfred Sherwood. The Procession of Life. Doubleday, 1972.