The second part of Henry the Sixth :
(The players' text of "The contention" of 1594, with the first folio text of The second part of King Henry the Sixth of 1623) /
with an introduction touching the question of the authorship, etc., of this play, by Charles W. Thomas ...
APA Citation
Shakespeare, W., Thomas, C. W., Shakespeare Society of New York. (1892). The second part of Henry the Sixth: (The players' text of "The contention" of 1594, with the first folio text of The second part of King Henry the Sixth of 1623). New York: Shakespeare Society of New York.
MLA Citation
Shakespeare, William, 1564-1616, Chas. W Thomas, and Shakespeare Society of New York. The Second Part of Henry the Sixth: (The Players' Text of "The Contention" of 1594, With the First Folio Text of The Second Part of King Henry the Sixth of 1623). New York: Shakespeare Society of New York, 1892.
Warning: These citations may not always be complete (especially for serials).