A revised and updated version of
Abraham Kuyper: An Annotated Bibliography 1857-2010 by Tjitze Kuipers (2011)
You can buy a printed edition of this book on the site of the publisher.
A policy proposal for like-minded deputies in the classis, which suggests how their actions may be strengthened and made more effective. Kuyper provides suggestions in this article about what to do before, during, and after the meeting of the classis (cf. 1870.18).