APA (7th ed.) Citation

Abbs, Freebairn, & Barker. (2000). Snapshot: Intermediate. Longman.

Chicago Style (17th ed.) Citation

Abbs, Freebairn, and Barker. Snapshot: Intermediate. Harlow: Longman, 2000.

MLA (8th ed.) Citation

Abbs, et al. Snapshot: Intermediate. Longman, 2000.