Warfare in Ancient Greece: A Sourcebook

https://books.google.es/books?id=W5iFAgAAQBAJ&pg=PA198&lpg=PA198&dq=%22macedonian+mercenaries%22&source=bl&ots=9eL11wykkF&sig=c326GZOslNkzzMlOHSv4LxXDzWk&hl=es&sa=X&ved=0ahUKEwjakIqI0-fTAhULBsAKHaNTB6oQ6AEIOTAD#v=onepage&q&f=false

https://books.google.es/books?id=W5iFAgAAQBAJ&pg=PA184&lpg=PA184&dq=500+cavalry+alexander&source=bl&ots=9fE1_rqrlD&sig=k8L5T5IKilAzit_tl4YYUsDdKa8&hl=es&sa=X&ved=0ahUKEwiIgrLgrsbaAhULkRQKHQc3DPwQ6AEIPzAC#v=onepage&q=500%20cavalry%20alexander&f=false