APA Style

Sales, R. (1978). Children's Britanica : HELEN OF TROY to IVY (VOLUME 9) (Third Edition, 1973, revised 1978). London: Encyclopaedia Britannica International.

MLA Style

Sales, Robin. "Children's Britanica : HELEN OF TROY to IVY (VOLUME 9)". Third Edition, 1973, revised 1978 London: Encyclopaedia Britannica International, 1978. Text.