The Art of Seo / Eric Enge, Stephan Spencer, Rand Fishkin and Jessie C. Stricchiola ; foreword by John Battelle, 2009: title page (Rand Fishkin) page [575] (CEO and co-founder of SEOmoz)

Lost and founder, ©2018: title page (Rand Fishkin) jacket (Rand Fishkin is the cofounder and former CEO of Moz, cofounder of Inbound.org, and just prior to this book's publication, founder of Spark Toro. He's a frequent traveler and speaker at startup and marketing events around the world, surprisingly well followed on Twitter (@randfish), an outspoken feminist, and, most proudly, a husband to author and humorist Geraldine DeRuiter. Rand lives in Seattle and fights it off with vitamin D supplements)

Moz website, viewed August 27, 2018 Moz was founded by Rand Fishkin and Gillian Muessig in 2004 https://moz.com/

Biblioteca del congreso (Estados Unidos), 27 marzo 2019: catálogo electrónico https://goo.gl/1dCSKV