Gerngross, G., & Puchta, H. Pictures in action.
Cita Chicago (17th ed.)Gerngross, Günter, i Herbert Puchta. Pictures in Action.
Cita MLA (8th ed.)Gerngross, Günter, i Herbert Puchta. Pictures in Action.
Atenció: Aquestes cites poden no estar 100% correctes.