Cita APA (7a ed.)
Leedy, P. D. (1980). Practical research: Planning and Desgn (2nd ed.). Macmillan.
Cita Chicago Style (17a ed.)
Leedy, Paul D. Practical Research: Planning and Desgn. 2nd ed. New York: Macmillan, 1980.
Cita MLA (9a ed.)
Leedy, Paul D. Practical Research: Planning and Desgn. 2nd ed. Macmillan, 1980.
Precaución: Estas citas no son 100% exactas.