Cita APA (7a ed.)

Schwarz, p. A., & Krug, R. E. (1972). Ability Testing in Developing Countries: A Handbook of Principles and Techniques. Praeger.

Cita Chicago Style (17a ed.)

Schwarz, paul A., y Robert E. Krug. Ability Testing in Developing Countries: A Handbook of Principles and Techniques. New York: Praeger, 1972.

Cita MLA (9a ed.)

Schwarz, paul A., y Robert E. Krug. Ability Testing in Developing Countries: A Handbook of Principles and Techniques. Praeger, 1972.