APA (7th ed.) Citation

Gethin, H. (1983). Grammar in context: Proficiency level English. Collins ELT.

Chicago Style (17th ed.) Citation

Gethin, Hugh. Grammar in Context: Proficiency Level English. London: Collins ELT, 1983.

MLA (9th ed.) Citation

Gethin, Hugh. Grammar in Context: Proficiency Level English. Collins ELT, 1983.

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