Jane Friedman has a great personal site at JaneFriedman.com, but she also publishes articles frequently at WritersWrite. One of the more popular ones is her annual “what paths are there to publishing”. The chart and text goes through six different publishing models:

1. Traditional publishing
   1. Big five
   2. Mid-size and large
   3. Small presses
2. Alternatives to traditional publishing
   1. Hybrid publishing
   2. Assisted self-publishing
   3. DIY

Her intro to the chart spells out the approach more clearly:

Since 2013, I have been annually updating this informational chart about the key publishing paths. […] One of the biggest questions I hear from authors today: Should I traditionally publish or self-publish? This is an increasingly complicated question to answer because:

1. There are now many varieties of traditional publishing and self-publishing—with evolving models and varying contracts.
2. You won’t find a universal, agreed-upon definition of what it means to “traditionally publish” or “self-publish.”
3. It’s not an either/or proposition. You can do both.

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