Cook, G. E. (1987). Merrill spelling for word mastery: Level 5. Merrill.
Chicago Style (17th ed.) CitationCook, Gillian E. Merrill Spelling for Word Mastery: Level 5. Toronto: Merrill, 1987.
MLA引文Cook, Gillian E. Merrill Spelling for Word Mastery: Level 5. Merrill, 1987.
警告:這些引文格式不一定是100%准確.