Citazione APA

Leedy, P. D. (2015). Practical research: Planning and design. Harlow, Essex: Pearson Education.

Stile di citazione Chicago

Leedy, Paul D. Practical Research: Planning and Design. Harlow, Essex: Pearson Education, 2015.

Citazione MLA

Leedy, Paul D. Practical Research: Planning and Design. Harlow, Essex: Pearson Education, 2015.

Attenzione: Queste citazioni potrebbero non essere precise al 100%.