William Shakespeare (2013). “Making Sense of Hamlet! a Students Guide to Shakespeare's Play (Includes Study Guide, Biography, and Modern Retelling)”, p.201, BookCaps Study Guides
William Shakespeare, George Steevens (1803). “The Plays of William Shakespeare: Accurately Printed from the Text of the Corrected Copy Left by the Late George Steevens, Esq. ; with Glossarial Notes”, p.146
William Shakespeare, John Payne Collier, Charles Knight (1847). “Romeo and Juliet. Othello. Hamlet. Macbeth. King Lear. Cymbeline. Timon of Athens. Coriolanus. Julius Caesar. Anthony and Cleopatra. Troilus and Cressida. Titus Andronicus. Pericles”