Cita APA (7th ed.)
Barker, J. A., Christensen, R. J., & Christensen, J. R. Pioneros de paradigmas. Charthouse Learning Corporation.
Cita Chicago (17th ed.)
Barker, Joel Arthur, Ray J. Christensen, i John R. Christensen. Pioneros De Paradigmas. Minneápolis, EUA: Charthouse Learning Corporation.
Cita MLA (9th ed.)
Barker, Joel Arthur, et al. Pioneros De Paradigmas. Charthouse Learning Corporation.
Atenció: Aquestes cites poden no estar 100% correctes.