Cita APA (7a ed.)

Williams, K., Boone, L. P., & Englebert, M. (1964). Spelling is fun. American Southern.

Cita Chicago Style (17a ed.)

Williams, Katie, Lalia Phipps Boone, y Merle Englebert. Spelling Is Fun. Montgomery, Alabama: American Southern, 1964.

Cita MLA (8a ed.)

Williams, Katie, et al. Spelling Is Fun. American Southern, 1964.