Xenophon. Memorabilia. Translated and edited by A. L. Bonnette. Ithaca, NY: Cornell University Press, 1994.

From the publisher:

An essential text for understanding Socrates, Xenophon’s Memorabilia is the compelling tribute of an affectionate student to his teacher, providing a rare firsthand account of Socrates’ life and philosophy. The Memorabilia is invaluable both as a work of philosophy in its own right and as a complement to the study of Plato’s dialogues. The longest of Xenophon’s four Socratic works, it is particularly revealing about the differences between Socrates and his philosophical predecessors.

Online:
Amazon
Perseus Project (Read Free Online in Greek)
Perseus Project (Read Free Online in English)
Perseus Project: Josiah Renick Smith, Xenophon: Memorabilia