Citazione Stile APA (7a Edizione)

Werner-Spanhoofd, A. (1948). Lehrbuch der deutschen Sprache: A practical course in German for high school academy or college. Heath.

Citazione stile Chigago Style (17a edizione)

Werner-Spanhoofd, Arnold. Lehrbuch Der Deutschen Sprache: A Practical Course in German for High School Academy or College. London [u.a.]: Heath, 1948.

Citatione MLA (9a ed.)

Werner-Spanhoofd, Arnold. Lehrbuch Der Deutschen Sprache: A Practical Course in German for High School Academy or College. Heath, 1948.