MLA

Jones, Randall L, et al. A Frequency Dictionary of German : Core Vocabulary for Learners. London: Routledge, 2006.

APA

Jones, R. L, Tschirner, E. P., Goldhahn, A., Buchwald, I., & Ittner, A. (2006). A frequency dictionary of German : core vocabulary for learners. London: Routledge.

Chicago

Jones, Randall L., Erwin P. Tschirner, Agnes Goldhahn, Isabel Buchwald, and Antina Ittner. A Frequency Dictionary of German: Core Vocabulary for Learners. London: Routledge, 2006.