Barna, George. The habits of highly effective churches : being strategic in your God-given ministry / George Barna. - Ventura, Calif. : Regal Books, c1999. - 194 pages ; 23 cm ISBN: 0830718559 9780830718559 0830718605 9780830718603 Subjects--Topical Terms: Christian leadership. Dewey Class. No.: 253