Ziglar, Zig. Top performance / Zig Ziglar. - Old Tappan, N.J. : F.H. Revell, c1986. - 288 p. ; 24 cm. Bibliography: p. 285-288. ISBN: 080071475X LCCN: 86006726 //r88 Subjects--Topical Terms: Executive ability.Business communication.Performance. LC Class. No.: HD 38.2 / .Z54 1986