Cita APA (7a ed.)

(2002). LONGMAN. Language activator: Helps you write and speak natural English (2nd. ed.). Pearson Education Limite. Logman.

Cita Chicago Style (17a ed.)

LONGMAN. Language Activator: Helps You Write and Speak Natural English. 2nd. ed. Essex: Pearson Education Limite. Logman, 2002.

Cita MLA (8a ed.)

LONGMAN. Language Activator: Helps You Write and Speak Natural English. 2nd. ed. Pearson Education Limite. Logman, 2002.