Cita APA (7a ed.)

ALEXANDER, L. G., & BAILEY, T. I. P. (1967). New Concept english: First Things Student's Book: : An integrated Course for Beginners; Supplementary Written Exercices. Longman.

Cita Chicago Style (17a ed.)

ALEXANDER, L. G., y Tom II. PETTENGEIL BAILEY. New Concept English: First Things Student's Book: : An Integrated Course for Beginners; Supplementary Written Exercices. London: Longman, 1967.

Cita MLA (9a ed.)

ALEXANDER, L. G., y Tom II. PETTENGEIL BAILEY. New Concept English: First Things Student's Book: : An Integrated Course for Beginners; Supplementary Written Exercices. Longman, 1967.