Cita APA (7th ed.)

Travers, P., Harrison, L., & Chong, C. S. (2015). Collins English for exams: Practice tests for IELTS. Collins.

Cita Chicago (17th ed.)

Travers, Peter, L. Harrison, i Chia Suan Chong. Collins English for Exams: Practice Tests for IELTS. London: Collins, 2015.

Cita MLA (9th ed.)

Travers, Peter, et al. Collins English for Exams: Practice Tests for IELTS. Collins, 2015.