Cita APA (7a ed.)

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

Cita Chicago Style (17a ed.)

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

Cita MLA (9a ed.)

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