Cita APA (7th ed.)

Abbs, B., & Freebairn, I. (1980). Building Strategies: Strategies 2. Longman.

Cita Chicago (17th ed.)

Abbs, Brian, i Ingrid Freebairn. Building Strategies: Strategies 2. England: Longman, 1980.

Cita MLA (9th ed.)

Abbs, Brian, i Ingrid Freebairn. Building Strategies: Strategies 2. Longman, 1980.