Ramus, P., & Ong, W. J. (1970). Scholae in liberales artes: Petrus Ramus. With an introduction by Walter J. Ong. Olms.
Lua i Stíl Chicago (17ú heag.)Ramus, Petrus, agus Walter J. Ong. Scholae in Liberales Artes: Petrus Ramus. With an Introduction by Walter J. Ong. Hildesheim ; New York: Olms, 1970.
Lua MLA (8ú heag.)Ramus, Petrus, agus Walter J. Ong. Scholae in Liberales Artes: Petrus Ramus. With an Introduction by Walter J. Ong. Olms, 1970.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.