APA (7th ed.) Citation

Duffy, G. G., Sherman, G. B., & Allington, R. L. (1973). How to teach reading systematically. Harper & Row.

Chicago Style (17th ed.) Citation

Duffy, Gerald G., George B. Sherman, and Richard L. Allington. How to Teach Reading Systematically. New York: Harper & Row, 1973.

MLA (9th ed.) Citation

Duffy, Gerald G., et al. How to Teach Reading Systematically. Harper & Row, 1973.