METZGER, Bruce M., A Textual Commentary On The Greek New Testament, Deutsche Bibelgesellschaft, United Bible Societies, Fourth Revised Edition.
Novum Testamentum Graece, Nestle-Aland 27th Edition, Deutsche Bibelgesellschaft, Stuttgart, 1993.
TISCHENDORF, Constantinus, The Constantinus Tischendorf Apparatus or Novum Testamentum Graece, Editio Octava Critica Maior, Vol. I, 1869; Vol. II 1872, Leipzig, Giesecke and Devrient; Vol 3, Prolegomena, edited by Caspar Rene Gregory, Leipzig: Hinrichs, 1894.
VON SODEN, Hermann Freiherr, Die Schriften des Neuen Testaments in ihrer ältesten erreichbaren Textgestalt hergestellt auf Grund ihrer Textgeschichte, Vandenhoeck und Ruprecht (Göttingen), 1913.
WILLKER, Wieland, An Online Textual Commentary on the Greek Gospels, Fifth edition, [http://www1.uni-bremen.de/~wie/TCG/index.html], Bremen, Germany, 2003-2006.
Westcott-Hort Greek Text, Westcott and Hort, prepared by Maurice A. Robinson, 1881
METZGER, Bruce M., A Textual Commentary On The Greek New Testament, Deutsche Bibelgesellschaft, United Bible Societies, Fourth Revised Edition.