APA

Onions C., Burchfield R. & Friedrichsen G. (1966). The Oxford dictionary of English etymology. Oxford: Clarendon Press.

Chicago

Onions C.T, Burchfield R.W and Friedrichsen G.W.S. 1966. The Oxford dictionary of English etymology. Oxford: Clarendon Press.

Harvard

Onions C., Burchfield R. and Friedrichsen G. (1966). The Oxford dictionary of English etymology. Oxford: Clarendon Press.

MLA

Onions C.T, Burchfield R.W and Friedrichsen G.W.S. The Oxford dictionary of English etymology. Oxford: Clarendon Press. 1966.