Cita APA (7th ed.)

Gerngross, G., & Puchta, H. (1992). Pictures in action. Prentice Hall.

Cita Chicago (17th ed.)

Gerngross, Gunter, i Herbert Puchta. Pictures in Action. New York: Prentice Hall, 1992.

Cita MLA (9th ed.)

Gerngross, Gunter, i Herbert Puchta. Pictures in Action. Prentice Hall, 1992.