APA (7th ed.) Citation

SCHOENBERG, I. E. Focus on Grammar: An introductory course for reference and practice. Longman.

Chicago Style (17th ed.) Citation

SCHOENBERG, Irene E. Focus on Grammar: An Introductory Course for Reference and Practice. Longman.

MLA (8th ed.) Citation

SCHOENBERG, Irene E. Focus on Grammar: An Introductory Course for Reference and Practice. Longman.

Warning: These citations may not always be 100% accurate.