I would like to cite an OER (Open Educational Resources) book in a concise way. The book is available here. The online pdf of the book says
Normally, the author and publisher would be credited here. However, the publisher has asked for the customary Creative Commons attribution to the original publisher, authors, title, and book URI to be removed. Additionally, per the publisher's request, their name has been removed in some passages.
I do have the names of the authors, from the "About the Authors" page, but I don't know the original order they were listed in. I wanted to do something like first-author et al. Is it fair to select the first one listed in the "About the Authors" page for that purpose?