Kecskes, I., & Papp, T. (2000). Foreign language and mother tongue. Lawrence Erlbaum Associates.
Cita Chicago (17th ed.)Kecskes, Istvan, i Tünde Papp. Foreign Language and Mother Tongue. Mahwah: Lawrence Erlbaum Associates, 2000.
Cita MLA (9th ed.)Kecskes, Istvan, i Tünde Papp. Foreign Language and Mother Tongue. Lawrence Erlbaum Associates, 2000.
Atenció: Aquestes cites poden no estar 100% correctes.