Cita APA (7th ed.)

John Jackman. (2011). Comprehension: Introductory Pupil Book (Collins Primary Focus) (Revised ed.). HarperCollins UK.

Cita Chicago (17th ed.)

John Jackman. Comprehension: Introductory Pupil Book (Collins Primary Focus). Revised ed. HarperCollins UK, 2011.

Cita MLA (9th ed.)

John Jackman. Comprehension: Introductory Pupil Book (Collins Primary Focus). Revised ed. HarperCollins UK, 2011.