Which prepositions should I use in the following sentence:
The final exam in (or) on a course of (or) by Dr.XYZ.
In Dictionary.com the preposition of is said to mean
2. (used to indicate derivation, origin, or source):
a man of good family; the plays of Shakespeare; a piece of cake.
Whereas by denotes authorship, or the work of someone
11. through the agency, efficacy, work, participation, or authority of:
The book was published by Random House.