HubSpot Marketing Plan: https://blog.hubspot.com/marketing/marketing-plan-examples
Smith Publicity Marketing Plan: https://www.smithpublicity.com/2019/09/creating-an-effective-book-marketing-plan/
The Write Life: What’s your book marketing plan: 6 crucial steps to include
IngramSpark: What to include in your book marketing strategy
BookLaunch: Book Marketing Plan: The Definitive Checklist
