Penguin Publishing
Penguin Random House: An Educational Companion to Eats, Shoots & Leaves [Pdf]
Eats, Shoots & Leaves illustrates the necessity of correct punctuation in order to convey intended meaning. Punctuation rules are stated here in a concise manner with accompanying exercises/keys.
Rutgers University
Rutgers University: Guide to Grammar and Style: Semicolon
The Guide to Grammar & Style provides this tutorial on two common uses for the semicolon: 1)to separate items in a list after a colon, and 2)to separate two independent clauses in one sentence.