Tohutoro APA (7th ed.)
Gatenby, E. V. (1960). A direct Method English Course (1a. ed.). Longman.
Tohutoru Kātū Chicago (17th ed.)
Gatenby, E. V. A Direct Method English Course. 1a. ed. Hong Kong: Longman, 1960.
Tohutoro MLA (9th ed.)
Gatenby, E. V. A Direct Method English Course. 1a. ed. Longman, 1960.
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