Ashworth-Fiedler, S. (1999). Beginner's German grammar. NTC/Contemporary Pub.
Cita Chicago Style (17a ed.)Ashworth-Fiedler, Susan. Beginner's German Grammar. Lincolnwood (Chicago), Ill: NTC/Contemporary Pub, 1999.
Cita MLA (9a ed.)Ashworth-Fiedler, Susan. Beginner's German Grammar. NTC/Contemporary Pub, 1999.
Precaución: Estas citas no son 100% exactas.