Cita APA (7th ed.)

Pittman, G. (1975). Preparatory technical english. Longman.

Cita Chicago (17th ed.)

Pittman, G.A. Preparatory Technical English. London: Longman, 1975.

Cita MLA (9th ed.)

Pittman, G.A. Preparatory Technical English. Longman, 1975.