APA (7th ed.) Citation

Schönfeldt, H. c. 2. J., & Zühlsdorff, K. (1959). A brief summary of English commercial correspondence (8., verb. Aufl.). Winkler.

Chicago Style (17th ed.) Citation

Schönfeldt, Hellmut ca. 20. Jh, and Karl-Heinz Zühlsdorff. A Brief Summary of English Commercial Correspondence. 8., verb. Aufl. Darmstadt: Winkler, 1959.

MLA (9th ed.) Citation

Schönfeldt, Hellmut ca. 20. Jh, and Karl-Heinz Zühlsdorff. A Brief Summary of English Commercial Correspondence. 8., verb. Aufl. Winkler, 1959.