Etymologicon.

MLA

Orion, et al. Etymologicon. Hildesheim ; New York : G. Olms, 1973.

APA

Orion, Sturz, F., Larcher, P. & Peyron, A. (1973). Etymologicon. Hildesheim ; New York : G. Olms.

Chicago

Orion, Friedrich Wilhelm Sturz, Pierre-Henri Larcher and Amedeo Peyron. Etymologicon. Edited by Friedrich Wilhelm Sturz. Hildesheim ; New York : G. Olms, 1973.