APA (7e ed.) Bronvermelding
Leedy, P., & Ormrod, J. E. (2010). Practical research: Planning and design (9th ed.). Pearson Education International.
Chicago (17e ed.) Bronvermelding
Leedy, Paul, en Jeanne Ellis Ormrod. Practical Research: Planning and Design. 9th ed. Upper saddle river, New Jersey: Pearson Education International, 2010.
MLA (9e ed.) Bronvermelding
Leedy, Paul, en Jeanne Ellis Ormrod. Practical Research: Planning and Design. 9th ed. Pearson Education International, 2010.
Let op: Deze citaties zijn niet altijd 100% accuraat.