Cita APA (7a ed.)

Sealey, G. (1972). Scope: Senior Course: Teacher`s book 1 and 2. (1a. ed.). The schools Council.

Cita Chicago Style (17a ed.)

Sealey, Greta. Scope: Senior Course: Teacher`s Book 1 and 2. 1a. ed. Londres: The schools Council, 1972.

Cita MLA (9a ed.)

Sealey, Greta. Scope: Senior Course: Teacher`s Book 1 and 2. 1a. ed. The schools Council, 1972.