APA (7th ed.) Citation

Bartels, B., & Röhr, H. (1981). The english companion's modern grammar (16. Aufl.). Diesterweg.

Chicago Style (17th ed.) Citation

Bartels, Bernhard, and Heinz Röhr. The English Companion's Modern Grammar. 16. Aufl. Frankfurt am Main [etc.]: Diesterweg, 1981.

MLA (9th ed.) Citation

Bartels, Bernhard, and Heinz Röhr. The English Companion's Modern Grammar. 16. Aufl. Diesterweg, 1981.

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