Cita APA (7a ed.)

Costa, H. V. (1972). An Intermediate english course. Loyola.

Cita Chicago Style (17a ed.)

Costa, Hélcio Veiga. An Intermediate English Course. São Paulo, SP: Loyola, 1972.

Cita MLA (9a ed.)

Costa, Hélcio Veiga. An Intermediate English Course. Loyola, 1972.