APA (7th ed.) Citation

Friederich, W. English grammar practice: For intermediate and advanced students. Hueber.

Chicago Style (17th ed.) Citation

Friederich, Wolf. English Grammar Practice: For Intermediate and Advanced Students. München: Hueber.

MLA (9th ed.) Citation

Friederich, Wolf. English Grammar Practice: For Intermediate and Advanced Students. Hueber.

Warning: These citations may not always be 100% accurate.