Cita APA (7th ed.)

Abbs, B. (1982). Opening Strategies: Strategies 1. Longman.

Cita Chicago (17th ed.)

Abbs, Brian. Opening Strategies: Strategies 1. Essex: Longman, 1982.

Cita MLA (9th ed.)

Abbs, Brian. Opening Strategies: Strategies 1. Longman, 1982.