National Prohibition Act was passed in 1919.
In January of 1919
1919
It was ratified in 1919
in the year 1919
In 1919 and National Prohibition went into effect the next year.
The law that started prohibition in 1920
To cite the Volstead Act in APA format, you would include the Act's title, its full title ("National Prohibition Act of 1919"), and the year it was enacted (1919). In the reference list, it would look like: National Prohibition Act of 1919, 1919.
Prohibition came as a result of strong pressure from various Protestant denominations and temperance groups such as the Prohibition Party and the Woman's Christian Temperance Union.
The Volstead Act
1919-1933
1919. It went into effect in 1920.