In derision of colons, here's a punctuation conundrum, or how futile can you get in American academia:
According to the 15th edition of The Chicago Manual of Style (University of Chicago Press), "a colon introduces an element or a series of elements illustrating or amplifying what has preceded the colon." But it also advises that when referring to a book, in text and in bibliographies, a colon should be placed between a title and a subtitle, regardless of how they appear on the title page.