Cita APA (7a ed.)

Puchta, H., & Gerngross, G. (1992). Creative grammar practice: Getting learners use both sides of the brain. Longman.

Cita Chicago Style (17a ed.)

Puchta, Herbert, y Günter Gerngross. Creative Grammar Practice: Getting Learners Use Both Sides of the Brain. Singapore: Longman, 1992.

Cita MLA (8a ed.)

Puchta, Herbert, y Günter Gerngross. Creative Grammar Practice: Getting Learners Use Both Sides of the Brain. Longman, 1992.