The official answer is as follows: USA system: 16 USA ounces to the USA pint. Imperial system (old British system): 20 imperial fluid ounces to the imperial pint. Note that the USA ounce and the imperial ounce are slightly different. The USA ounce is larger; it's 29.6 mL, whereas the imperial ounce is 28.4 mL.
The Modern Language Association or the MLA writing format is used commonly when writing papers in the liberal arts and humanities field.
In previous editions of the MLA Handbook, researchers were required to locate the citation format for the source that they used. For example, if a magazine was used, researchers needed to locate the specific citation format for periodicals.