Apostolicity and unity : essays on the Porvoo common statement /
edited by Ola Tjr̜hom 
. - Michigan ; Cambridge ; Geneva  : William B. Eerdmans Publishing ; Grand Rapids ; WCC Publications,  2002 
. - XII, 271 p.  23 cm. 
<br/><label>  ISBN: </label>0-8028-0969-3 ; 2-8254-1375-5