APA
Blackstone B., . (19541959). Manual of advanced english for foreign students # Manual of advanced English. London: Longman Group Limited.
Chicago
Blackstone Bernard, . 19541959. Manual of advanced english for foreign students # Manual of advanced English. London: Longman Group Limited.
Harvard
Blackstone B., . (19541959). Manual of advanced english for foreign students # Manual of advanced English. London: Longman Group Limited.
MLA
Blackstone Bernard, . Manual of advanced english for foreign students # Manual of advanced English. London: Longman Group Limited. 19541959.