Earebondel ta de tachtigste jierdei fan Dr. G.A. Wumkes op 4 september 1949. Oanbean troch de fryske akademy.

Dutch Calvinists in early Stuart London. The Dutch Church in Austin Friars 1603-1642. Publications of the Sir Thomas Browne Institute Leiden (werkgroep Engels-Nederlandse betrekkingen). New series, no. 11).