Cita APA (7th ed.)

Cook, G. E. (1987). Merrill spelling for word mastery: Level 5. Merrill.

Cita Chicago (17th ed.)

Cook, Gillian E. Merrill Spelling for Word Mastery: Level 5. Toronto: Merrill, 1987.

Cita MLA (9th ed.)

Cook, Gillian E. Merrill Spelling for Word Mastery: Level 5. Merrill, 1987.