Cita APA (7th ed.)

Nelson, J. L. (1977). Population and progress: Is there a conflict? (2ª ed.). Prentice Hall.

Cita Chicago (17th ed.)

Nelson, Jack L. Population and Progress: Is There a Conflict? 2ª ed. Prentice Hall, 1977.

Cita MLA (9th ed.)

Nelson, Jack L. Population and Progress: Is There a Conflict? 2ª ed. Prentice Hall, 1977.