Marcus Sheridan – They Ask, You Answer: A Revolutionary Approach to Inbound
Sales, Content Marketing, and Today’s Digital Consumer. Wiley,
2019 porchlightbooks.com.


Ryan Deiss – Invisible Selling Machine. Digital Marketing Lab, LLC,
2015 thriftbooks.com.


Russell Brunson – DotCom Secrets: The Underground Playbook for Growing Your
Company Online. Morgan James Publishing, 2015 openlibrary.orgopenlibrary.org.


Kit Smith – “56 Lead Generation Statistics and Trends.” Sopro, 2025 sopro.iosopro.io.


Larry Kim – “What’s a Good Conversion Rate? (It’s Higher Than You Think).”
WordStream, updated 2023 wordstream.com.


Greg Sterling – “B2B buyers consume an average of 13 content pieces before deciding
on a vendor.” MarTech, 2020 martech.org.


Yara Simón – “7 Lead-Nurturing Strategies.” Business News Daily,
2024 businessnewsdaily.combusinessnewsdaily.com.