APA (7th ed.) Citation

Sage Publications & Roehling, E. (2015). Congress: How it works. EVG Online.

Chicago Style (17th ed.) Citation

Sage Publications and Edward Roehling. Congress: How It Works. Greenwood, Indiana: EVG Online, 2015.

MLA (9th ed.) Citation

Sage Publications and Edward Roehling. Congress: How It Works. EVG Online, 2015.