Cita APA (7a ed.)

Abbs, B., & Freebairn, I. (1979). Buildind strategies: Strategies 2, an integrated language course for learners of english (1st edition.). Longman.

Cita Chicago Style (17a ed.)

Abbs, Brian, y Ingrid Freebairn. Buildind Strategies: Strategies 2, an Integrated Language Course for Learners of English. 1st edition. London: Longman, 1979.

Cita MLA (8a ed.)

Abbs, Brian, y Ingrid Freebairn. Buildind Strategies: Strategies 2, an Integrated Language Course for Learners of English. 1st edition. Longman, 1979.