Birkett, G. A. Key to the exercises in A modern Russian course (1st, 2nd, and 3rd editions).
Chicago Style (17th ed.) CitationBirkett, G. A. Key to the Exercises in A Modern Russian Course (1st, 2nd, and 3rd Editions).
MLA (9th ed.) CitationBirkett, G. A. Key to the Exercises in A Modern Russian Course (1st, 2nd, and 3rd Editions).
Warning: These citations may not always be 100% accurate.