Palmer, H. E. (1965). English practice books: Elementary oral exercises: book 1. Longmans, Green and Co. LTD. Ballantyne Press Spottiswoode, Ballantyne & Co. Ltd.
Citazione stile Chigago Style (17a edizione)Palmer, Harold E. English Practice Books: Elementary Oral Exercises: Book 1. Londres, Inglaterra: Longmans, Green and Co. LTD. Ballantyne Press Spottiswoode, Ballantyne & Co. Ltd, 1965.
Citatione MLA (9a ed.)Palmer, Harold E. English Practice Books: Elementary Oral Exercises: Book 1. Longmans, Green and Co. LTD. Ballantyne Press Spottiswoode, Ballantyne & Co. Ltd, 1965.
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