Cita APA

Vai, M., & Vai, M. (1998). The heart of the matter: High-intermediate listening, speaking, and critical thinking. Boston, Massachusetts: Heinle & Heinle.

Citación estilo Chicago

Vai, Marjorie, y Marjorie Vai. The Heart of the Matter: High-intermediate Listening, Speaking, and Critical Thinking. Boston, Massachusetts: Heinle & Heinle, 1998.

Cita MLA

Vai, Marjorie, y Marjorie Vai. The Heart of the Matter: High-intermediate Listening, Speaking, and Critical Thinking. Boston, Massachusetts: Heinle & Heinle, 1998.