Cita APA (7a ed.)

Pittman, G. (1970). Preparatory technical English: Teacher's book ([4th. imp.].). Longman.

Cita Chicago Style (17a ed.)

Pittman, G.A. Preparatory Technical English: Teacher's Book. [4th. imp.]. London: Longman, 1970.

Cita MLA (9a ed.)

Pittman, G.A. Preparatory Technical English: Teacher's Book. [4th. imp.]. Longman, 1970.