Cita APA (7th ed.)

Kahlen, L. (2005). Interactive German grammar made easy. McGraw-Hill.

Cita Chicago (17th ed.)

Kahlen, Lisa. Interactive German Grammar Made Easy. New York: McGraw-Hill, 2005.

Cita MLA (9th ed.)

Kahlen, Lisa. Interactive German Grammar Made Easy. McGraw-Hill, 2005.