Cita APA (7th ed.)

Pearson, C. (1977). Getting down to business in english. Heinmann Educational Books.

Cita Chicago (17th ed.)

Pearson, Christopher. Getting Down to Business in English. London: Heinmann Educational Books, 1977.

Cita MLA (9th ed.)

Pearson, Christopher. Getting Down to Business in English. Heinmann Educational Books, 1977.