APA

Whimbey A., Lochhead J., . (1981). Instructor's manual to accompany Developing mathematical skills: computation, problem solving, and basics for algebra. New York: McGraw-Hill.

Chicago

Whimbey Arthur, Lochhead Jack, . 1981. Instructor's manual to accompany Developing mathematical skills: computation, problem solving, and basics for algebra. New York: McGraw-Hill.

Harvard

Whimbey A., Lochhead J., . (1981). Instructor's manual to accompany Developing mathematical skills: computation, problem solving, and basics for algebra. New York: McGraw-Hill.

MLA

Whimbey Arthur, Lochhead Jack, . Instructor's manual to accompany Developing mathematical skills: computation, problem solving, and basics for algebra. New York: McGraw-Hill. 1981.