Cita APA (7a ed.)

Pierce, J. E., & Hanna, I. V. (1974). The development of a phonological system in English speaking American children. Hapi Press.

Cita Chicago Style (17a ed.)

Pierce, Joe E., y Ingrid Vanwaardenburg Hanna. The Development of a Phonological System in English Speaking American Children. Portland, Oregon: Hapi Press, 1974.

Cita MLA (9a ed.)

Pierce, Joe E., y Ingrid Vanwaardenburg Hanna. The Development of a Phonological System in English Speaking American Children. Hapi Press, 1974.