APA (7th ed.) Citation

Side, R., & Wellman, G. (1999). Grammar and vocabulary for Cambridge Advanced and Proficiency. Longman.

Chicago Style (17th ed.) Citation

Side, Richard, and Guy Wellman. Grammar and Vocabulary for Cambridge Advanced and Proficiency. Harlow, Essex, England: Longman, 1999.

MLA (9th ed.) Citation

Side, Richard, and Guy Wellman. Grammar and Vocabulary for Cambridge Advanced and Proficiency. Longman, 1999.