APA (7th ed.) Citation

Bartels, B. (1970). The English companion's modern grammar.

Chicago Style (17th ed.) Citation

Bartels, Bernhard. The English Companion's Modern Grammar. 1970.

MLA (9th ed.) Citation

Bartels, Bernhard. The English Companion's Modern Grammar. 1970.

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