Cita APA (7th ed.)

REIN, D. P. (1985). Grolier advanced english course 4. Grolier International.

Cita Chicago (17th ed.)

REIN, David P. Grolier Advanced English Course 4. (sl): Grolier International, 1985.

Cita MLA (9th ed.)

REIN, David P. Grolier Advanced English Course 4. Grolier International, 1985.