Shakespeare, William, 1564-1616. King Henry the Fourth, part II
Shakespeare, William, 1564-1616. Henry IV, part 2
Because the two parts of King Henry IV have become known as numbered parts of the collective title King Henry IV, the Library of Congress treats them and subfields them that way, even though they were not so conceived by Shakespeare.
His King Henry the Fourth, part II, c1985.
William Shakespeare's Henry IV, part 2, 1987 CIP t.p.