Παραπομπή APA

Huebener, T., & Newmark, M. (1952). First course in German.

Παραπομπή Chicago Style

Huebener, Theodore, και Maxim Newmark. First Course in German. 1952.

Παραπομπή MLA

Huebener, Theodore, και Maxim Newmark. First Course in German. 1952.