APA

Lipsey R. G., Steiner P. O. & Purvis D. D. (1987). Economics. New York: Harper & Row.

Chicago

Lipsey Richard G, Steiner Peter Otto and Purvis Douglas D. 1987. Economics. New York: Harper & Row.

Harvard

Lipsey R. G., Steiner P. O. and Purvis D. D. (1987). Economics. New York: Harper & Row.

MLA

Lipsey Richard G, Steiner Peter Otto and Purvis Douglas D. Economics. New York: Harper & Row. 1987.