APA (7th ed.) Citation

Abbs, B., & Freebairn, I. (1979). Building strategies: An integrated course for learners of english. Longman.

Chicago Style (17th ed.) Citation

Abbs, Brian, and Ingrid Freebairn. Building Strategies: An Integrated Course for Learners of English. Londres: Longman, 1979.

MLA (9th ed.) Citation

Abbs, Brian, and Ingrid Freebairn. Building Strategies: An Integrated Course for Learners of English. Longman, 1979.