Cita APA

Casley, D. J., & Lury, D. A. (1981). Data collection in developing countries.

Citación estilo Chicago

Casley, D J., y D A. Lury. Data Collection in Developing Countries. London, English Language Book Society, 1981.

Cita MLA

Casley, D J., y D A. Lury. Data Collection in Developing Countries. 1981.