APA

(1990). Webster's ninth new collegiate dictionary. Massachusetts, U.S.A: Merriam Co. Publishers.

Chicago

1990. Webster's ninth new collegiate dictionary. Massachusetts, U.S.A: Merriam Co. Publishers.

Harvard

(1990). Webster's ninth new collegiate dictionary. Massachusetts, U.S.A: Merriam Co. Publishers.

MLA

Webster's ninth new collegiate dictionary. Massachusetts, U.S.A: Merriam Co. Publishers. 1990.