Cita APA (7a ed.)

Schwarz, N., & Hippler, H. (1990). Response alternatives: The impact of their choice and presentation order. ZUMA-Arbeitsbericht.

Cita Chicago Style (17a ed.)

Schwarz, Norbert, y Hans-Jürgen Hippler. "Response Alternatives: The Impact of Their Choice and Presentation Order." ZUMA-Arbeitsbericht 1990.

Cita MLA (9a ed.)

Schwarz, Norbert, y Hans-Jürgen Hippler. "Response Alternatives: The Impact of Their Choice and Presentation Order." ZUMA-Arbeitsbericht, 1990.