APA (7th ed.) Citation

Alter. (2001). Essential English usage & grammar 4: J. B. Alter. Times Educational.

Chicago Style (17th ed.) Citation

Alter. Essential English Usage & Grammar 4: J. B. Alter. Singapore: Times Educational, 2001.

MLA (8th ed.) Citation

Alter. Essential English Usage & Grammar 4: J. B. Alter. Times Educational, 2001.

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