Cita APA (7a ed.)

Freese, G., & Milford, A. (2011). My first alphabet activity book: Develop first spelling skills (Rev. ed.). Letterland.

Cita Chicago Style (17a ed.)

Freese, Gudrun, y Alison Milford. My First Alphabet Activity Book: Develop First Spelling Skills. Rev. ed. Cambridge: Letterland, 2011.

Cita MLA (9a ed.)

Freese, Gudrun, y Alison Milford. My First Alphabet Activity Book: Develop First Spelling Skills. Rev. ed. Letterland, 2011.