Organum (genus musicae)
Organum est primum musicae polyphonicae genus notum, Europaea saeculi noni inventum. Consistit in duabus, tribus, vel quattuor vocibus: cantus Gregorianus et transpositio vel transpositiones cantus. Primae litterae qui organum describunt sunt Musica enchiriadis, liber circa annum 895 scriptus. Qui organum componerent appellati sunt et adhuc in libris eruditis appellantur "organistae."

Bibliographia
 Commentarii varii, praecipue "Organum", "Musica enchiriadis", "Hucbald", et "St Martial," in The New Grove Dictionary of Music and Musicians, ed. Stanley Sadie. 20 vol. Londinii: Macmillan Publishers Ltd., 1980. ISBN 1-56159-174-2.
 Magnus Liber Organi, Parisian Liturgical Polyphony from the Twelfth and Thirteenth Centuries. 7 vol. Les Éditions de l'Oiseau-Lyre, Monaci, 1988–1993, generalis editor Edward H. Roesner.
 Baxter, J. H., ed. 1931. An Old St. Andrews Music Book. [De W1, primum manu scriptum polyphoniae Nostrae Damae.]
 Crocker, Richard, et David Hiley, eds. 1990. The New Oxford History of Music: The Early Middle Ages to 1300. Novi Eboraci: Oxford University Press).
 Dittmer, Luther, ed. Magnus Liber Organi (F) Pluteo 29.1, Bibliotheca Mediceo-Laurenziana, Firenze. Facsimilé. Brooklyn Novi Eboraci: Institute of Medieval Music. Medieval Manuscripts in Reproduction, 10 & 11.
 Grout, Donald J., et Claude V. Palisca. A History of Western Music. Novi Eboraci: W. W. Norton & Co. ISBN 0-393-97527-4.
 Hoppin, Richard H. 1978. Medieval Music. Novi Eboraci: W.W. Norton & Co. ISBN 0-393-09090-6.
 Huff, Jay A. 1963. Ad organum faciendum et Item de organo, Musical Theorists in Translation. Vol. 8  Brooklyn, Novi Eboraci: Institute of Mediaeval Music.
 Palisca, Claude V., ed. 1995. Musica enchiridas and Scolica enchiridas. Portus Novus: Yale University Press.
 Reese, Gustave. Music in the Middle Ages. Novi Eboraci: W. W. Norton & Co. ISBN 0-393-09750-1.
 Strunk, Oliver. Source Readings in Music History. Novi Eboraci: W. W. Norton & Co. ISBN 0-393-09742-0.
 Waite, William G.. 1954 1976. The Rhythm of Twelfth-Century Polyphony. Portus Novus: Yale University Press.

Nexus externi
 The Organa of the Winchester Troper
 Appendix to The Organa of the Winchester Troper.

Genera musica
Verba Graeca mutuata