Overview
Disciplines use different formatting styles (e.g., MLA, APA, ASA, IEEE, etc.). For instance, graduate students in History might use the Chicago Manual of Style for formatting their written works while graduate students in Electrical Engineering might use IEEE. Psychology graduate students will most likely use APA formatting style while graduate students in the field of Chemistry might use ACS style.
The bottom line is that part of becoming an advanced-level student in your area of study involves becoming comfortable with using the expected formatting styles within your field.
Formatting Style in Occupational Therapy
The field of Occupational Therapy exclusively uses APA formatting style. The comprehensive APA guide from the Purdue Online Writing Lab (OWL) is a good resource to use when formatting your graduate papers.
However, when you are writing professionally (e.g., for a publication), always check to ensure what formatting style the publication requires.