Cita APA (7a ed.)

Salas, R. M. (1977). People: An internacional choice : the multilateral approach to population. Pergamon.

Cita Chicago Style (17a ed.)

Salas, Rafael M. People: An Internacional Choice : The Multilateral Approach to Population. Oxford [etc.]: Pergamon, 1977.

Cita MLA (9a ed.)

Salas, Rafael M. People: An Internacional Choice : The Multilateral Approach to Population. Pergamon, 1977.