Cita APA (7th ed.)

Abbs, B., & Freebairn, I. (1977). Starting strategies: Strategies 1, an integrated language course for beginners of english (1a. ed.). Longman.

Cita Chicago (17th ed.)

Abbs, Brian, i Ingrid Freebairn. Starting Strategies: Strategies 1, an Integrated Language Course for Beginners of English. 1a. ed. Essex: Longman, 1977.

Cita MLA (9th ed.)

Abbs, Brian, i Ingrid Freebairn. Starting Strategies: Strategies 1, an Integrated Language Course for Beginners of English. 1a. ed. Longman, 1977.