APA (7th ed.) Citation

Perotinus, c. 1. c. [Alleluya (Nativitas) (Rokseth, Poluphonies... viol. 2, p. 16]. Organum, Alleluia, nativitas gloriosae. s.n.

Chicago Style (17th ed.) Citation

Perotinus, ca. 12th-13th century-. [Alleluya (Nativitas) (Rokseth, Poluphonies... Viol. 2, P. 16]. Organum, Alleluia, Nativitas Gloriosae. s.n: s.n.

MLA (9th ed.) Citation

Perotinus, ca. 12th-13th century-. [Alleluya (Nativitas) (Rokseth, Poluphonies... Viol. 2, P. 16]. Organum, Alleluia, Nativitas Gloriosae. s.n.