Deismireacht APA

Roberts, P. D. (1987). Plan English a user's guide. USA: Penguin Books.

Trích dẫn kiểu Chicago

Roberts, Philip Davies. Plan English a User's Guide. USA: Penguin Books, 1987.

Deismireacht MLA

Roberts, Philip Davies. Plan English a User's Guide. USA: Penguin Books, 1987.

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