By New Car Test Drive
Now in the third year of its current design, the 2012 Buick LaCrosse offers attractive styling, quality materials, a comfortable ride and a bevy of available electronic gadgets. The 2012 LaCrosse comes standard with a four-cylinder engine that uses a small electric motor for improved fuel economy, a system called eAssist. A V6 engine is available with optional all-wheel drive.

most likely it is the web site that published your article, hence "By..."