APA (7th ed.) Citation

Gruber, E. C. (1970). English grammar 1000 steps (2. printing.). Arco.

Chicago Style (17th ed.) Citation

Gruber, Edward C. English Grammar 1000 Steps. 2. printing. New York, NY: Arco, 1970.

MLA (9th ed.) Citation

Gruber, Edward C. English Grammar 1000 Steps. 2. printing. Arco, 1970.

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