Citazione Stile APA (7a Edizione)

Abbs, B., & Freebairn, I. (1981). Developing Strategies. Students' Book. Strategies 3. Longman.

Citazione stile Chigago Style (17a edizione)

Abbs, Brian, e Ingrid Freebairn. Developing Strategies. Students' Book. Strategies 3. Essex: Longman, 1981.

Citatione MLA (9a ed.)

Abbs, Brian, e Ingrid Freebairn. Developing Strategies. Students' Book. Strategies 3. Longman, 1981.