Cita APA (7a ed.)

Fishman, J. A., Ferguson, C. A., & Gupta, J. D. (1968). Language problems of developing nations. John Wiley & Sons.

Cita Chicago Style (17a ed.)

Fishman, Joshua A., Charles A. Ferguson, y Jyotirindra Das Gupta. Language Problems of Developing Nations. New York [etc.]: John Wiley & Sons, 1968.

Cita MLA (9a ed.)

Fishman, Joshua A., et al. Language Problems of Developing Nations. John Wiley & Sons, 1968.