APA

Onions (C T) Ed, . (1991). The Oxford Dictionary of English Etymology. : .

Chicago

Onions (C T) Ed, . 1991. The Oxford Dictionary of English Etymology. : .

Harvard

Onions (C T) Ed, . (1991). The Oxford Dictionary of English Etymology. : .

MLA

Onions (C T) Ed, . The Oxford Dictionary of English Etymology. : . 1991.